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首页ANSYS CFX-Pre 18.1 用户指南:操作与指导
ANSYS CFX-Pre 18.1 用户指南:操作与指导
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更新于2024-07-19
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"ANSYS 18.1 CFX-Pre 用户指南是ANSYS公司发布的一份详尽的用户手册,旨在帮助用户理解和操作ANSYS CFX的前处理部分。这份英文指南涵盖了CFX-Pre的各类功能和操作流程,适用于进行流体动力学模拟的工程人员。"
在ANSYS CFX-Pre 18.1中,用户可以找到关于如何设置物理模型、几何导入与编辑、网格划分、边界条件设定以及求解器设置等全面的指导。CFX-Pre是ANSYS CFX的重要组成部分,它负责处理模拟前的所有准备工作,确保数据准备准确无误,以供CFX求解器进行计算。
首先,理解物理定义是使用CFX-Pre的关键。这包括选择正确的流动模型(如Navier-Stokes方程、欧拉方程等)、湍流模型(如k-ε模型、RANS或LES方法)以及热传递和化学反应等复杂物理现象的建模。用户需要根据具体问题的特性来选择合适的模型。
在几何处理方面,CFX-Pre支持多种格式的几何模型导入,如IGES、STEP和 Parasolid等。用户可以利用其内置工具进行几何修复、布尔运算、拆分和组合等操作,以适应流体分析的需要。同时,高质量的网格划分对结果的准确性至关重要,CFX-Pre提供了自动和手动网格划分方法,包括结构化、非结构化和混合网格等。
边界条件的设定是另一个重要环节,用户需要为流体区域定义入口、出口、壁面和其他边界条件,如速度、压力、温度和物性值。此外,对于多体或运动问题,还需要设置运动边界条件,如滑移或自由表面等。
求解器设置涉及到时间步长、迭代次数、收敛标准和并行计算策略等。ANSYS CFX求解器采用高级的算法,如PISO、SIMPLEC等,以确保快速且稳定地达到收敛。
最后,CFX-Pre提供了丰富的后处理功能,使用户能够可视化流场、温度分布、压力梯度等结果,并进行数据分析。通过集成在ANSYS Workbench中的工作流程,用户还可以实现与其他ANSYS模块的无缝对接,如Mechanical进行结构分析,或者ICEM CFD进行高级的网格划分。
ANSYS CFX-Pre 18.1用户指南是进行CFD(计算流体动力学)分析的重要参考资料,为用户提供了一站式的解决方案,涵盖了从问题设置到结果解析的全过程。无论是新手还是经验丰富的工程师,都能从中受益,提升模拟精度和效率。
20.1.3.1. Transient Scheme ...................................................................................................... 212
20.1.3.2. Convergence Control ................................................................................................. 212
20.1.3.2.1. Min. Coeff. Loops ............................................................................................... 212
20.1.3.2.2. Max. Coeff. Loops ............................................................................................... 212
20.1.3.2.3. Fluid Timescale Control ..................................................................................... 212
20.1.3.2.4. Solid Timescale Control ..................................................................................... 212
20.1.4. Immersed Solid Control ...................................................................................................... 212
20.2. Equation Class Settings Tab ......................................................................................................... 214
20.3. External Coupling Tab ................................................................................................................. 214
20.4. Particle Control Tab ..................................................................................................................... 214
20.5. Rigid Body Control Tab ................................................................................................................ 214
20.6. Advanced Options Tab ................................................................................................................ 218
21. Output Control .................................................................................................................................. 223
21.1. User Interface ............................................................................................................................. 223
21.1.1. Results Tab ......................................................................................................................... 223
21.1.1.1. Option ....................................................................................................................... 223
21.1.1.2. File Compression ....................................................................................................... 223
21.1.1.3. Output Variables List .................................................................................................. 224
21.1.1.4. Output Equation Residuals Check Box ........................................................................ 224
21.1.1.5. Output Boundary Flows Check Box ............................................................................. 224
21.1.1.6. Output Variable Operators Check Box ......................................................................... 224
21.1.1.7. Extra Output Variables List ......................................................................................... 224
21.1.1.8. Output Particle Boundary Vertex Fields Check Box ...................................................... 224
21.1.2. Backup Tab ......................................................................................................................... 224
21.1.2.1. List Box ...................................................................................................................... 224
21.1.2.2. [Backup Results Name] ............................................................................................... 224
21.1.2.2.1. Option .............................................................................................................. 224
21.1.2.2.2. File Compression ............................................................................................... 224
21.1.2.2.3. Output Variables List ......................................................................................... 225
21.1.2.2.4. Output Equation Residuals Check Box ............................................................... 225
21.1.2.2.5. Output Boundary Flows Check Box .................................................................... 225
21.1.2.2.6. Output Variable Operators Check Box ................................................................ 225
21.1.2.2.7. Extra Output Variables List ................................................................................. 225
21.1.2.2.8. Output Particle Boundary Vertex Fields Check Box ............................................. 225
21.1.2.2.9. Include Tracks of One-way Coupled Particles Check Box ..................................... 225
21.1.2.2.10. Output Frequency: Option ............................................................................... 225
21.1.2.3. Backup Data Retention .............................................................................................. 225
21.1.2.3.1. Option .............................................................................................................. 225
21.1.3. Transient Results Tab .......................................................................................................... 225
21.1.3.1. List Box ...................................................................................................................... 226
21.1.3.2. [Transient Results Name] ............................................................................................ 226
21.1.3.2.1. Option .............................................................................................................. 226
21.1.3.2.2. File Compression ............................................................................................... 226
21.1.3.2.3. Output Variables List ......................................................................................... 226
21.1.3.2.4. Include Mesh .................................................................................................... 226
21.1.3.2.5. Output Equation Residuals Check Box ............................................................... 226
21.1.3.2.6. Output Boundary Flows Check Box .................................................................... 226
21.1.3.2.7. Output Variable Operators Check Box ................................................................ 226
21.1.3.2.8. Extra Output Variables List ................................................................................. 226
21.1.3.2.9. Output Particle Boundary Vertex Fields Check Box ............................................. 227
21.1.3.2.10. Output Frequency ........................................................................................... 227
21.1.3.3. Transient Blade Row Results ....................................................................................... 227
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21.1.4.Transient Statistics Tab ........................................................................................................ 228
21.1.4.1. List Box ...................................................................................................................... 228
21.1.4.2. [Transient Statistics Name] ......................................................................................... 228
21.1.4.2.1. Option .............................................................................................................. 228
21.1.4.2.2. Output Variables List ......................................................................................... 228
21.1.4.2.3. Start Iteration List Check Box ............................................................................. 228
21.1.4.2.3.1. Start Iteration List Check Box: Start Iteration List ........................................ 229
21.1.4.2.4. Stop Iteration List Check Box ............................................................................. 229
21.1.4.2.4.1. Stop Iteration List Check Box: Stop Iteration List ........................................ 229
21.1.5. Monitor Tab ........................................................................................................................ 229
21.1.5.1. Monitor Objects Check Box ........................................................................................ 229
21.1.5.1.1. Monitor Coeff. Loop Convergence ...................................................................... 230
21.1.5.1.2. Monitor Balances: Option .................................................................................. 230
21.1.5.1.3. Monitor Forces: Option ...................................................................................... 230
21.1.5.1.4. Monitor Residuals: Option ................................................................................. 230
21.1.5.1.5. Monitor Totals: Option ....................................................................................... 230
21.1.5.1.6. Monitor Particles: Option ................................................................................... 230
21.1.5.1.7. Efficiency Output Check Box .............................................................................. 231
21.1.5.1.7.1. Inflow Boundary ....................................................................................... 231
21.1.5.1.7.2. Outflow Boundary .................................................................................... 231
21.1.5.1.7.3. Efficiency Type .......................................................................................... 231
21.1.5.1.7.4. Efficiency Calculation Method ................................................................... 231
21.1.5.1.8. Monitor Points And Expressions List Box ............................................................ 231
21.1.5.1.8.1. [Monitor Name]: Option ............................................................................ 231
21.1.5.1.8.2. [Monitor Name]: Output Variables List ....................................................... 232
21.1.5.1.8.3. [Monitor Name]: Cartesian Coordinates ..................................................... 232
21.1.5.1.8.4. [Monitor Name]: Cylindrical Coordinates ................................................... 232
21.1.5.1.8.5. [Monitor Name]: Expression Value ............................................................. 233
21.1.5.1.8.6. [Monitor Name]: Coordinate Frame ........................................................... 233
21.1.5.1.8.7. [Monitor Name]: Monitor Location Control ................................................ 233
21.1.5.1.8.8. [Monitor Name]: Monitor Statistics ............................................................ 234
21.1.5.1.9. Aerodynamic Damping: Frame Overview ........................................................... 236
21.1.5.1.10. Aerodynamic Damping List Box ....................................................................... 236
21.1.5.1.11. Aerodynamic Damping: [Aerodynamic Damping Name]: Option ....................... 237
21.1.5.1.12. Aerodynamic Damping: [Aerodynamic Damping Name]: Normalization ............ 237
21.1.5.1.13. Aerodynamic Damping: [Aerodynamic Damping Name]: Location Type ............ 237
21.1.5.1.14. Aerodynamic Damping: [Aerodynamic Damping Name]: Integration Multipli-
er ..................................................................................................................................... 237
21.1.5.1.15. Aerodynamic Damping: [Aerodynamic Damping Name]: Integration Interval .... 237
21.1.5.1.16. Radiometer: Frame Overview ........................................................................... 237
21.1.5.1.17. Radiometer: List Box ........................................................................................ 238
21.1.5.1.17.1. Radiometer: [Radiometer Name]: Option ................................................. 238
21.1.5.1.17.2. Radiometer: [Radiometer Name]: Cartesian Coordinates .......................... 238
21.1.5.1.17.3. Radiometer: [Radiometer Name]:Temperature ......................................... 238
21.1.5.1.17.4. Radiometer: [Radiometer Name]: Quadrature Points ................................ 238
21.1.5.1.17.5. Radiometer: [Radiometer Name]: Coordinate Frame Check Box ................ 238
21.1.5.1.17.6. Radiometer: [Radiometer Name]: Coordinate Frame Check Box: Coordinate
Frame ......................................................................................................................... 238
21.1.5.1.17.7. Radiometer: [Radiometer Name]: Diagnostic Output Level Check Box ...... 238
21.1.5.1.17.8. Radiometer: [Radiometer Name]: Diagnostic Output Level Check Box: Dia-
gnostic Output Level .................................................................................................. 238
21.1.5.1.17.9. Radiometer: [Radiometer Name]: Direction: Option .................................. 238
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CFX-Pre User's Guide
21.1.5.1.17.10. Radiometer: [Radiometer Name]: Direction: X Component,Y Component,
Z Component ............................................................................................................. 238
21.1.5.1.18. Monitor Surfaces: Frame Overview ................................................................... 239
21.1.5.1.19. Monitor Surfaces: List Box ................................................................................ 239
21.1.5.1.19.1. Monitor Surfaces: [Monitor Surface Name]: Option ................................... 239
21.1.5.1.19.2. Monitor Surfaces: [Monitor Surface Name]: Coordinate Frame .................. 239
21.1.5.1.19.3. Monitor Surfaces: [Monitor Surface Name]: Output Variables List .............. 239
21.1.5.1.19.4. Monitor Surfaces: [Monitor Surface Name]: Output Location List .............. 239
21.1.5.1.19.5. Monitor Surfaces: [Monitor Surface Name]: File Compression Level .......... 240
21.1.5.1.19.6. Monitor Surfaces: [Monitor Surface Name]: Output Frequency ................. 240
21.1.5.1.20. Monitor Surfaces: Monitor Location Data Retention .......................................... 240
21.1.6. Particles Tab ....................................................................................................................... 240
21.1.6.1. Particle Track File Check Box ....................................................................................... 240
21.1.6.1.1. Option .............................................................................................................. 240
21.1.6.1.2.Track Positions Check Box .................................................................................. 241
21.1.6.1.3.Track Positions Check Box:Track Positions .......................................................... 241
21.1.6.1.4. Interval ............................................................................................................. 241
21.1.6.1.5.Track Distance Spacing ...................................................................................... 241
21.1.6.1.6.Track Time Spacing ............................................................................................ 241
21.1.6.1.7.Track Printing Interval Check Box ....................................................................... 242
21.1.6.1.8.Track Printing Interval Check Box: Interval .......................................................... 242
21.1.6.1.9. Keep Track File Check Box .................................................................................. 242
21.1.6.1.10.Track File Format Check Box ............................................................................. 242
21.1.6.1.11.Track File Format Check Box:Track File Format .................................................. 242
21.1.6.2. Particle Histogram ..................................................................................................... 243
21.1.6.2.1. Histogram Type ................................................................................................. 243
21.1.6.2.2. Number of Bins ................................................................................................. 243
21.1.6.2.3. Particle Definition ............................................................................................. 243
21.1.6.2.4. x Variable .......................................................................................................... 243
21.1.6.2.5. y Variable .......................................................................................................... 244
21.1.6.2.6. Histogram Lower Bound .................................................................................... 244
21.1.6.2.7. Histogram Upper Bound ................................................................................... 244
21.1.6.2.8. Particle Sampling .............................................................................................. 244
21.1.6.2.9. Export Format ................................................................................................... 244
21.1.6.2.10. Export Frequency ............................................................................................ 244
21.1.6.3.Transient Particle Diagnostics ..................................................................................... 244
21.1.6.4.Transient Particle Diagnostics: List Box ........................................................................ 245
21.1.6.5.Transient Particle Diagnostics: [Transient Particle Diagnostics Name] ........................... 245
21.1.6.5.1. Option .............................................................................................................. 245
21.1.6.5.2. Particles List ...................................................................................................... 245
21.1.6.5.3. Spray Mass Frac. ................................................................................................ 245
21.1.6.5.4. Penetration Origin and Direction: Option ........................................................... 245
21.1.6.5.5. Penetration Origin and Direction: Injection Center ............................................. 245
21.1.6.5.6. Penetration Origin and Direction: Injection Direction ......................................... 245
21.1.6.5.6.1. Option ..................................................................................................... 245
21.1.6.5.7. Axial Penetration: Option ................................................................................... 245
21.1.6.5.8. Radial Penetration: Option ................................................................................. 246
21.1.6.5.9. Normal Penetration: Option ............................................................................... 246
21.1.6.5.10. Spray Angle: Option ......................................................................................... 246
21.1.6.5.10.1. Spray Angle: Spray Radius at Penetration Origin Check Box ...................... 246
21.1.6.5.10.2. Spray Angle: Spray Radius at Penetration Origin Check Box: Spray Radi-
us ............................................................................................................................... 246
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CFX-Pre User's Guide
21.1.7. Export Results Tab .............................................................................................................. 246
21.1.7.1. List Box ...................................................................................................................... 246
21.1.7.2. [Export Name]: Option ............................................................................................... 247
21.1.7.3. [Export Name]: Export Format .................................................................................... 247
21.1.7.3.1. Filename Prefix Check Box ................................................................................. 247
21.1.7.3.2. Filename Prefix Check Box: Filename Prefix ........................................................ 247
21.1.7.3.3. Include Topology Check Box .............................................................................. 247
21.1.7.3.4. Include File Info Header Check Box .................................................................... 247
21.1.7.3.5. Precision Check Box .......................................................................................... 247
21.1.7.3.6. Precision Check Box: Precision ........................................................................... 247
21.1.7.4. [Export Name]: Export Frequency ............................................................................... 248
21.1.7.4.1. Option .............................................................................................................. 248
21.1.7.5. [Export Name]: Export Surface .................................................................................... 248
21.1.7.5.1. List Box ............................................................................................................. 248
21.1.7.5.2. [Export Surface Name]: Option .......................................................................... 248
21.1.7.5.3. [Export Surface Name]: Particle Definition List .................................................... 248
21.1.7.5.4. [Export Surface Name]: Output Boundary List .................................................... 249
21.1.7.5.5. [Export Surface Name]: Location Type ................................................................ 249
21.1.7.5.6. [Export Surface Name]: Output Variables List ...................................................... 249
21.1.7.5.7. [Export Surface Name]: Output Nodal Area Vectors Check Box ............................ 249
21.1.7.5.8. [Export Surface Name]: Excitation Frequency ..................................................... 249
21.1.7.5.9. [Export Surface Name]: Accumulation Period ..................................................... 250
21.1.8. Common Settings .............................................................................................................. 250
21.1.8.1. Option ....................................................................................................................... 250
21.1.8.2. File Compression ....................................................................................................... 251
21.1.8.3. Output Variables List .................................................................................................. 251
21.1.8.4. Output Equation Residuals Check Box ........................................................................ 251
21.1.8.5. Output Boundary Flows Check Box ............................................................................. 252
21.1.8.6. Output Variable Operators Check Box ......................................................................... 252
21.1.8.7. Output Particle Boundary Vertex Fields Check Box ...................................................... 252
21.1.8.8. Output Frequency Options ........................................................................................ 253
21.1.8.8.1. Timestep Interval .............................................................................................. 253
21.1.8.8.2.Timestep List ..................................................................................................... 253
21.1.8.8.3. Time Interval ..................................................................................................... 253
21.1.8.8.4. Time List ........................................................................................................... 253
21.1.8.8.5. Every Timestep .................................................................................................. 253
21.1.8.8.6. Every Iteration ................................................................................................... 253
21.1.8.8.7. Iteration Interval ............................................................................................... 253
21.1.8.8.8. Iteration List ...................................................................................................... 253
21.1.8.8.9.Wall Clock Time Interval ..................................................................................... 253
21.1.8.8.10. Coupling Step Interval ..................................................................................... 254
21.1.8.8.11. Every Coupling Step ........................................................................................ 254
21.1.8.8.12. None ............................................................................................................... 254
21.2. Working with Output Control ...................................................................................................... 254
21.2.1.Working with Transient Statistics ......................................................................................... 254
21.2.1.1. Statistic Initialization and Accumulation ..................................................................... 254
21.2.1.2. Statistics as Variable Operators ................................................................................... 255
21.2.1.3. Using Statistics with Transient Rotor-Stator Cases ....................................................... 255
21.2.2. Working with Monitors ....................................................................................................... 256
21.2.2.1. Setting up Monitors ................................................................................................... 256
21.2.2.2.Transient/ Mesh Deformation Runs ............................................................................. 257
21.2.2.3. Output Information ................................................................................................... 257
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CFX-Pre User's Guide
21.2.2.4. Expression ................................................................................................................. 257
21.2.2.5.Viewing Monitor Values during a Run ......................................................................... 257
21.2.2.6.Viewing Monitor Point Values after a Run .................................................................... 257
21.2.2.7. Using Monitors in CEL ................................................................................................ 258
21.2.3. Working with Export Results ............................................................................................... 259
21.2.3.1. File Naming Conventions ........................................................................................... 259
21.2.3.2. Propagating Older Time Step Values ........................................................................... 260
21.2.3.3. Output Boundary List and Output Region Naming ...................................................... 260
21.2.3.4. Output Variables List .................................................................................................. 260
22. Transient Blade Row Models ............................................................................................................. 261
22.1. Inserting a New Transient Blade Row Models Object .................................................................... 261
22.2.Transient Blade Row Models Details View ..................................................................................... 261
22.2.1.Transient Blade Row Model Settings .................................................................................... 261
22.2.1.1. Time Transformation Disturbance Settings ................................................................. 262
22.2.1.2. Fourier Transformation Disturbance Settings .............................................................. 264
22.2.1.2.1. Basic Settings Tab .............................................................................................. 264
22.2.1.2.2. Advanced Options Tab ...................................................................................... 266
22.2.1.2.2.1. Frequency Filtering ................................................................................... 266
22.2.2. Transient Method ............................................................................................................... 266
23. Mesh Adaption .................................................................................................................................. 269
23.1. Overview .................................................................................................................................... 269
23.2. Setting Up Mesh Adaption .......................................................................................................... 271
23.3.The Details View for Mesh Adaption ............................................................................................. 272
23.3.1. Basic Settings Tab ............................................................................................................... 272
23.3.1.1. Region List ................................................................................................................. 272
23.3.1.2. Save Intermediate Files .............................................................................................. 272
23.3.1.3. Adaption Criteria ....................................................................................................... 272
23.3.1.3.1. Variables List ..................................................................................................... 272
23.3.1.3.2. Max. Num. Steps ................................................................................................ 273
23.3.1.3.3. Option .............................................................................................................. 273
23.3.1.4. Adaption Method ...................................................................................................... 273
23.3.1.4.1. Option .............................................................................................................. 273
23.3.1.4.2. Minimum Edge Length ...................................................................................... 273
23.3.1.5. Adaption Convergence Criteria .................................................................................. 274
23.3.2. Advanced Options Tab ........................................................................................................ 274
23.3.2.1. Node Alloc. Parameter ................................................................................................ 274
23.3.2.2. Number of Levels ....................................................................................................... 274
23.4. Advanced Topic: Adaption with 2D Meshes .................................................................................. 275
24. Expert Control Parameters ................................................................................................................ 277
24.1. Modifying Expert Control Parameters .......................................................................................... 277
25. Coordinate Frames ............................................................................................................................ 279
25.1. Creating a New Coordinate Frame ............................................................................................... 279
25.2. Coordinate Frame Basic Settings Tab ........................................................................................... 279
25.2.1. Coordinate Frame: Option ................................................................................................... 280
25.2.1.1. Point and Normal ....................................................................................................... 280
25.2.1.2. Axis Points ................................................................................................................. 280
25.2.2. Coordinate Frame: Centroid ................................................................................................ 280
25.2.2.1. Location .................................................................................................................... 280
25.2.2.2. Centroid Type ............................................................................................................ 280
25.2.3. Coordinate Frame: Direction ............................................................................................... 281
25.2.3.1. Invert Normal Axis Direction Check Box ...................................................................... 281
25.2.3.2. Point on Reference Plane 1-3 Check Box ..................................................................... 281
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