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May 4, 2015, 14:46 |
Total pressure BC
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#1 |
Member
Giovanni Caramia
Join Date: Mar 2009
Location: Bari, ITALY
Posts: 58
Rep Power: 17 |
Hi guys,
does anyone know why in totalPressureFvPatchScalarField.H file it is written that for compressible transonic flows it must be gamma<=1 and for compressible supersonic it must be gamma>1? Is that gamma the ratio of specific heats (Cp/Cv)? Code:
3. compressible transonic (\gamma <= 1): \f[ p_T = \frac{p_0}{1 + 0.5 \psi |U|^2} \f] where \vartable p_T | total pressure [Pa] p_0 | reference pressure [Pa] G | coefficient given by \f$\frac{\gamma}{1-\gamma}\f$ \endvartable 4. compressible supersonic (\gamma > 1): \f[ p_T = \frac{p_0}{(1 + 0.5 \psi G |U|^2)^{\frac{1}{G}}} \f] where \vartable \gamma | ratio of specific heats (Cp/Cv) p_T | total pressure [Pa] p_0 | reference pressure [Pa] \psi | compressibility [m2/s2] G | coefficient given by \f$\frac{\gamma}{1-\gamma}\f$ \endvartable |
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July 23, 2015, 08:31 |
Wall function disabling
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#2 |
New Member
Ricardo Ferreira
Join Date: May 2015
Posts: 16
Rep Power: 10 |
Hi everybody, how can I desable wall function in OpenFoam? This is wall boundary condition setted for nut, k and omega with wall functions using the kOmegaSST:
nut file: walls { type nutUWallFunction; value uniform 0; } k file: walls { type kqRWallFunction; value uniform 0.0152696; } omega file: walls { type omegaWallFunction; value uniform 0; } Thanks. Best Regards, Ricardo. |
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