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Forum: OpenFOAM Running, Solving & CFD June 16, 2006, 12:01
Replies: 14
Views: 2,870
Posted By maka
the p in formulation that I us

the p in formulation that I use is a redefined pressure (dynamic pressure) p = p0 + g y (in case of g is scalar in the -ve y direction) or in a general tensorial form, p = p0 - g_i x_i, where g = [0,...
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 14:38
Replies: 14
Views: 2,870
Posted By maka
in the link you refered to, g

in the link you refered to, g is a scalar so the term must be on the right hand side with the following form:
+ g*alpha*(T-TRef)

but in my case g is a vector (gi) that alow for -ve sign (the...
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 13:14
Replies: 14
Views: 2,870
Posted By maka
I switched off the buoyancy te

I switched off the buoyancy term, and the problem is much less than before but this was using zeroGradient for wall pressure b.c. The spacial pressure difference increases with time.

I notice...
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 12:30
Replies: 14
Views: 2,870
Posted By maka
this is using OpenFOAM V 1.2.

this is using OpenFOAM V 1.2.
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 11:26
Replies: 14
Views: 2,870
Posted By maka
I changed the boundary conditi

I changed the boundary condition from zeroGradient to wallBuoyantPressure and I got the following error message.

It seems that the b.c. is expecting a rho to be a calculation variable. How can I...
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 07:34
Replies: 14
Views: 2,870
Posted By maka
I can see the picture now in m

I can see the picture now in my previous message, can you?
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 07:09
Replies: 14
Views: 2,870
Posted By maka
yes, I'm running a modified ch

yes, I'm running a modified channelOodles without any subgrid model (DNS) and with energy equation (using Boussinesq assmp.), my formulation agrees with Henery comment on the following message: ...
Forum: OpenFOAM Running, Solving & CFD June 15, 2006, 04:08
Replies: 14
Views: 2,870
Posted By maka
I noticed that near the period

I noticed that near the periodic inlet there is a huge jump in pressure or order 100. But this is only in the inlet. Can the choise of pRefCell, being near this boundry, cause this big spacial...
Forum: OpenFOAM Running, Solving & CFD June 14, 2006, 09:38
Replies: 14
Views: 2,870
Posted By maka
I'm running a channel case, dr

I'm running a channel case, driven by specified pressure gradient with mesh 128x48x64 in xyz (8 PI , 2, 2 PI), stream-wise, wall-normal, span-wise.

I started by field generated by perturbU. The...
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