Node158 - CFD SUPPORT

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Modifications to Practice

In file blockMeshDict we can change computational mesh to 50×50 cells^8.1.
# gedit constant/polyMesh/blockMeshDict
```
blocks          
(
    hex (0 1 2 3 4 5 6 7) (50 50 1) simpleGrading (1 1 1)
);
```
Run blockMesh:
# blockMesh
Let us change time step to 0.0005s and computation time to 1.5s. Solution will be saved in times 0.1, 0.2, 0.3, …, 1.5s (instead of number of time steps). Let’s modify controlDict, e.g.:
# gedit system/controlDict
```
stopAt          endTime;

endTime         1.5;

deltaT          0.0005;

writeControl    runTime;

writeInterval   0.1;
```
Run icoFoam on background and forward output into the text file log:
# icoFoam > log &
It is useful to watch the log file content to see how the computation goes:
# tail -f log
By pressing ctrl+c one can jump back to the console
Results can be viewed during computation in paraview (button Refresh Times always rereads the time layers):
# paraFoam

Figure: Lid driven cavity: velocity magnitude and vector field.

Next: Model setting without an Up: Alternative formulation Previous: Alternative formulation Contents Index