INTRODUCTION 1-7
1.3 Optional Features
Optional features (for thermal analysis, fluid analysis, parallel processing and C++ programming
that includes the ability to write user-defined contact models and create user-written C++ code) are
available as separate modules that can be included in PFC
2D
at an additional cost.
Also available is a thermal-analysis option which simulates the transient flux of heatin materials and
the subsequent development of thermally induced displacements and forces. The thermal model
can be run independently or coupled to the mechanical model. Thermal strains are produced by
modifying the particle radii and the force carried in each parallel bond to account for heating of
both particles and bonding material. The thermal-analysis capability is described in Section 1 in
Optional Features.
The fluid-analysis option allows users to simulate fluid coupling problems. The scheme solves the
continuity and momentum equations of fluid numerically in Eulerian Cartesian coordinates on a
fixed grid, then derives pressure and velocity for each fixed cell by considering the existence of
balls within the cell. Driving forces from fluid flow are applied to balls as body forces. The fluid
option is described in Section 2 in Optional Features.
The user-written C++ code option allows users to write their own code in the C++ language and
then create a private version of PFC
2D
from which that code can be executed. This option can be
used instead of FISH functions to speed up execution considerably. The Microsoft Visual C++
Version 7.1 compiler is used to create the private version of PFC
2D
. The user-written C++ code is
described in Section 3 in Optional Features.
A parallel-processing version of PFC
2D
is provided as an optional feature. The parallel version
allows the division of a PFC
2D
model into several parts that can be run in parallel on separate
processors. This can provide a substantial increase in memory capacity and calculation speed
compared to operation of a PFC
2D
model on one processor. MPI (Message Passing Interface)
is also implemented in the parallel processing option to allow communication with the AC/DC
(Adaptive Continuum/Discontinuum) logic, or with the user-written C++ code option. The parallel
version and parallel calculation procedure are described in Section 4 in Optional Features. (Note
that the thermal analysis option will not operate in parallel mode.)
User-defined contact constitutive models can be written in C++ and compiled as DLL (dynamic
link library) files that can be loaded whenever needed with this optional feature. The Microsoft
Visual C++ Version 7.1 compiler is used to compile the DLL files. The procedure to write new
contact models and create DLLs is described in Section 5 in Optional Features.
PFC
2D
Version 3.1
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