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June 20, 2012, 07:13 |
outlet-vent pressure adaption
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#1 |
Senior Member
Join Date: May 2011
Location: Germany
Posts: 130
Rep Power: 15 |
Hi,
following case (see: http://www.cfd-online.com/Forums/flu...daption.html): I do have 3 pressure-vent outlets. At the end I want to have a specific mass flow rate at each outlet (-+5%). If I use target mass flow rate my calculations crash (pressure is adapted every time step, right?) So I want somehow a function (UDF?) which check the mass flow after 1000 iterations. If it is within a limit its fine, if not the pressure should be adapted (lets say old_pressure - 1000) ... and this gain every 1000 iterations ... Can you help me with this? I had no experience with UDF so far and I just did it manually (stop after 1000 iterations, check mass flow, change pressure) ... Thanks |
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