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Search took 0.00 seconds. Search: Posts Made By: david_h
Forum: OpenFOAM Running, Solving & CFD September 29, 2006, 08:09
Replies: 33
Views: 8,448
Posted By david_h
Along these lines, it would al

Along these lines, it would also help if you could post the model(OpenFOAM files) or a more detailed schematic of the flow system you are simulating. If neither of these is possible, would you be...
Forum: OpenFOAM Running, Solving & CFD September 7, 2006, 08:07
Replies: 33
Views: 8,448
Posted By david_h
I noticed that you have a shar

I noticed that you have a sharp temperature gradient at the inlet. You might try running the simulation with a longer inlet pipe to prevent diffusive (turbulent and conductive) heat losses at the...
Forum: OpenFOAM Running, Solving & CFD September 6, 2006, 09:46
Replies: 33
Views: 8,448
Posted By david_h
Try inserting p.oldTime() in "

Try inserting p.oldTime() in "createFields.H" after p is created. This statement exists in rhopSonicFoam but not in sonicTurbFoam. If the previous values of p are not being stored, then the DpDt...
Forum: OpenFOAM Running, Solving & CFD September 5, 2006, 13:31
Replies: 33
Views: 8,448
Posted By david_h
One other thing you might take

One other thing you might take look at is the turbulence model. For example in:
/src/turbulenceModels/compressible/kEpsilon/kEpsilon.C,
the R() function includes a "(2/3)*k" term, however...
Forum: OpenFOAM Running, Solving & CFD September 1, 2006, 08:54
Replies: 33
Views: 8,448
Posted By david_h
Did you run CFX with viscous d

Did you run CFX with viscous dissipation. The energy equation in sonicTurbFoam, "hEqn.H", does not appear to have a viscous dissipation term, which might explain a few degrees of temperature...
Forum: OpenFOAM Running, Solving & CFD August 30, 2006, 09:30
Replies: 33
Views: 8,448
Posted By david_h
If I understood correctly you

If I understood correctly you are calculating the mass as m = V/R {p}/{T}. Where { } denotes the volume average. Have you tried calculating the mass as m = V/R {p/T} ?
Forum: OpenFOAM Running, Solving & CFD August 30, 2006, 08:11
Replies: 33
Views: 8,448
Posted By david_h
How did you calculate the syst

How did you calculate the system mass, m, the dotted curve in the t vs. (m0 - m) plot ?
Dave
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