Pitz Daily oodles pressure field problem

prapanj · September 8, 2009, 07:55

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

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

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!

September 8, 2009, 07:55	Pitz Daily oodles pressure field problem	#1
prapanj Senior Member Prapanch Nair Join Date: Mar 2009 Location: Bangalore, India Posts: 105 Rep Power: 17	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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September 27, 2010, 12:32		#2
vicent87 New Member vinz Join Date: Sep 2010 Posts: 1 Rep Power: 0	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