CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   Pitz Daily oodles pressure field problem (http://www.cfd-online.com/Forums/openfoam-solving/68142-pitz-daily-oodles-pressure-field-problem.html)

prapanj September 8, 2009 07:55

Pitz Daily oodles pressure field problem
 
Hi,

I was trying to run pitzDaily tutotial case under oodles (OF1.5.x). The pressure field is not making any sense to me. The pressure field is switching between +ve to negative values throughout and changing from time step to time step. I changed the fluctuation scale value in turbulentInlet boundary condition of U to (0 0 0) and then I was getting consistent pressure values.

why would this happen? Is the pressure BC at the inlet wrong ? I tried oodles on an external flow sim where forces were important and I was getting similar fluctuation in field, ( drag and lift oscillating in random).

Anybody has some insight on this?

Thanks,
Prapanj.

vicent87 September 27, 2010 12:32

Hi:

I'm also trying to run pitzDaily tutorial case under oodles (OF 1.5.X). I have a problem like your. I want to know how you can correct it.

Thanks a lot,
vicent87

zcjwyl March 29, 2012 11:15

Hej, now 2 years has gone, I have the same problem now. unphysical pressure field with turbulentInlet. Did anybody slove it:(


Quote:

Originally Posted by prapanj (Post 228864)
Hi,

I was trying to run pitzDaily tutotial case under oodles (OF1.5.x). The pressure field is not making any sense to me. The pressure field is switching between +ve to negative values throughout and changing from time step to time step. I changed the fluctuation scale value in turbulentInlet boundary condition of U to (0 0 0) and then I was getting consistent pressure values.

why would this happen? Is the pressure BC at the inlet wrong ? I tried oodles on an external flow sim where forces were important and I was getting similar fluctuation in field, ( drag and lift oscillating in random).

Anybody has some insight on this?

Thanks,
Prapanj.


fluentfreak April 12, 2012 01:49

Quote:

Originally Posted by zcjwyl (Post 352190)
Hej, now 2 years has gone, I have the same problem now. unphysical pressure field with turbulentInlet. Did anybody slove it:(

I am so amazed that no one seems to be interested in figuring this out!
I have the same problem in the latest version with pisoFoam solver and the LES PitzDaily tutorial:
http://www.cfd-online.com/Forums/ope...-pisofoam.html
Someone please help!


All times are GMT -4. The time now is 11:38.