interpolate 在openfoam中使用的示例代码
时间: 2023-11-24 07:06:42 浏览: 88
在OpenFOAM中,使用插值函数需要在C++代码中进行编写。以下是一个简单的插值函数示例代码,用于在网格上插值一个矢量场:
```
#include "fvCFD.H"
#include "interpolation.H"
int main()
{
// 定义网格和场
fvMesh mesh("mesh");
volVectorField U("U", mesh);
// 定义插值函数
linearInterpolation linInterp(mesh);
vectorInterpolation vecInterp(mesh);
// 定义要插值的位置
vector pos(0.1, 0.2, 0.3);
// 线性插值矢量场
vector interpU = vecInterp.interpolate(U, pos);
// 线性插值标量场
scalar interpP = linInterp.interpolate(p, pos);
return 0;
}
```
在上面的示例中,我们使用了OpenFOAM中的插值函数库 interpoaltion.H,并定义了要插值的矢量场 U 和标量场 p。我们还定义了要插值的位置 pos,并使用线性插值函数进行插值。
相关问题
interpolate openfoam
Interpolation is the process of estimating values of a function between known data points. In the context of OpenFOAM, interpolation is often used to transfer data between different mesh regions or to interpolate boundary conditions.
OpenFOAM provides several interpolation methods, including linear, nearest neighbor, and weighted least squares. These methods can be applied to various fields, such as velocity, pressure, and temperature.
To interpolate data in OpenFOAM, you can use the `interpolate` utility or the `interpolationSchemes` dictionary in the case setup files. The `interpolate` utility allows you to interpolate specific fields at specified locations, while the `interpolationSchemes` dictionary allows you to set the interpolation method and other parameters for different fields.
Here is an example of using the `interpolate` utility to interpolate the velocity field from one mesh to another:
```
interpolate -case case1 -fromSet sourceMesh -toSet targetMesh -field U
```
This command interpolates the `U` velocity field from the `sourceMesh` to the `targetMesh` in the `case1` directory.
Overall, interpolation is an important tool in OpenFOAM for transferring and manipulating data between different mesh regions, and it is worth exploring the different interpolation methods and options available in the software.
openfoam中interinterPhaseChangeFoam的动量方程代码
在 OpenFOAM 中,InterPhaseChangeFoam solver 的动量方程主要分为两部分:气相和液相。具体代码如下:
气相部分:
```c++
fvVectorMatrix UEqn
(
fvm::ddt(U)
+ fvm::div(phi, U)
- fvm::laplacian(muEff, U)
);
UEqn.relax();
solve(UEqn == -fvc::grad(p));
```
其中,UEqn 表示动量方程,U 表示速度向量,phi 表示速度通量,muEff 表示粘性系数,p 表示压力。`fvm::ddt` 表示时间导数,`fvm::div` 表示散度,`fvm::laplacian` 表示拉普拉斯算子,`fvc::grad` 表示梯度。
液相部分:
```c++
fvVectorMatrix UEql
(
fvm::ddt(UL)
+ fvm::div(phiL, UL)
- fvm::laplacian(muEffL, UL)
);
UEql.relax();
solve(UEql == -fvc::grad(pL));
```
其中,UEql 表示液相动量方程,UL 表示液相速度向量,phiL 表示液相速度通量,muEffL 表示液相粘性系数,pL 表示液相压力。
需要注意的是,在 InterPhaseChangeFoam solver 中,气相和液相之间的速度通量通过一个额外的边界条件联系在一起,具体实现如下:
```c++
surfaceScalarField alpha1
(
"alpha1",
fvc::interpolate(alpha1_)
);
surfaceScalarField alpha2
(
"alpha2",
1.0 - alpha1
);
phi = fvc::interpolate(alpha1*UEqn.flux()
+ alpha2*UEql.flux()
+ (1.0 - alpha1 - alpha2)*U*magSf);
```
其中,alpha1 和 alpha2 表示两相的体积分数,phi 表示总的速度通量。
阅读全文