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August 2, 2009, 11:56 |
The cavity Tutorial
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Senior Member
Ahmed
Join Date: Mar 2009
Location: NY
Posts: 251
Rep Power: 18 |
Being new to OpenFOAM, I tried the first tutorial, i.e., the cavity problem, a classic case found on most CFD solvers's tutorials, I tried to see how accurate is the solution obtained by OF, the initial mesh distribution is 20x20x1. I increased the mesh resolution to 40x40x1, 80x80x1 and 160x160x1. In each case I plotted both the pressure and U velocity magnitude. here they are
The only remark I can make is that the maximum/minimum pressure values double each time the mesh resolution is doubled. A couple of questions come to my mind 1- Will I ever get a solution independent of the mesh resolution 2- How small should I go to reach that solution Am I missing something? N.B. The time step has been decreased in each case to maintain a courant number less than 1 |
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