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Pitz Daily oodles pressure field problem

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Old   September 8, 2009, 08:55
Default Pitz Daily oodles pressure field problem
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Prapanch Nair
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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.
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Old   September 27, 2010, 13:32
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vinz
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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
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Old   March 29, 2012, 12:15
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Joyi Wang
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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 View Post
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.
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Old   April 12, 2012, 02:49
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fluentfreak
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Quote:
Originally Posted by zcjwyl View Post
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:
Fluctuating Pressure Fields (LES-pisoFoam)
Someone please help!
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