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April 19, 2008, 05:15 |
Good Morning everyone,
i wo
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#1 |
Member
Christian Winkler
Join Date: Mar 2009
Location: Mannheim, Germany
Posts: 63
Rep Power: 17 |
Good Morning everyone,
i would like to add a new density pressure relation to a compressible solver (low Ma-Number, isothermal, laminar Flow). It looks like: rho = p * 1/(A + Bp) // A and B are constants Problem: all compressible solvers in OF use a linear relation for compressibility (unless i missed something). -> psi = drho/dp With this, my psi would be a function of p, which is not allowed in the pressure equation. Does anyone out there managed to solve a similar problem or could give me some hints about literature for this kind of pressure equations? Thanks and best regards Christian |
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April 23, 2008, 23:30 |
Christian,
How about recalcul
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#2 |
Member
David P. Schmidt
Join Date: Mar 2009
Posts: 71
Rep Power: 17 |
Christian,
How about recalculating psi every PISO iteration using the latest available pressure? Psi would be slightly lagged, but if B is not too large, I think it would work. -DPS |
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