Pressure Velocity boundary condition problem

deepsterblue · September 19, 2008, 10:36

zeroGradient for both pressure and velocity on the outlet? And also, fixedValue for both pressure/velocity on inlets? Doesn't seem too consistent to me.

I'd try fixedValue velocity and zeroGradient pressure on inlets.
And fixedValue pressure and zeroGradient velocity on outlets.

mkraposhin · September 19, 2008, 11:00

p:
fixedFluxBuoyantPressure for walls, zeroGradient for inlets and fixedValue for outlet

ameya · September 20, 2008, 09:29

Hi Sandeep and Matvej

Thanks for your support.

I have already started my runs based on your suggestions, but i had a doubt.

I have given face at the top of the tank as outlet.
Exact pressure, that shall arise out Pressure velocity cooupling is unkown, Will atmospheric pressure work.

ameya · September 24, 2008, 07:19

Hi Sandeep and Matvej

I acted on your suggestions but still i am getting same results

September 19, 2008, 10:36	zeroGradient for both pressure	#1
deepsterblue Senior Member Sandeep Menon Join Date: Mar 2009 Location: Amherst, MA Posts: 403 Rep Power: 25	zeroGradient for both pressure and velocity on the outlet? And also, fixedValue for both pressure/velocity on inlets? Doesn't seem too consistent to me. I'd try fixedValue velocity and zeroGradient pressure on inlets. And fixedValue pressure and zeroGradient velocity on outlets. __________________ Sandeep Menon University of Massachusetts Amherst https://github.com/smenon

September 19, 2008, 11:00	p: fixedFluxBuoyantPressure f	#2
mkraposhin Senior Member Matvey Kraposhin Join Date: Mar 2009 Location: Moscow, Russian Federation Posts: 355 Rep Power: 21	p: fixedFluxBuoyantPressure for walls, zeroGradient for inlets and fixedValue for outlet __________________ MDPI Fluids (Q2) special issue for OSS software: https://www.mdpi.com/journal/fluids/..._modelling_OSS GitHub: https://github.com/unicfdlab Linkedin: https://linkedin.com/in/matvey-kraposhin-413869163 RG: https://www.researchgate.net/profile/Matvey_Kraposhin

September 20, 2008, 09:29	Hi Sandeep and Matvej Thank	#3
ameya New Member Ameya Durve Join Date: Mar 2009 Location: Mumbai, Maharashtra, India Posts: 20 Rep Power: 17	Hi Sandeep and Matvej Thanks for your support. I have already started my runs based on your suggestions, but i had a doubt. I have given face at the top of the tank as outlet. Exact pressure, that shall arise out Pressure velocity cooupling is unkown, Will atmospheric pressure work.

September 24, 2008, 07:19	Hi Sandeep and Matvej I act	#4
ameya New Member Ameya Durve Join Date: Mar 2009 Location: Mumbai, Maharashtra, India Posts: 20 Rep Power: 17	Hi Sandeep and Matvej I acted on your suggestions but still i am getting same results

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
inlet velocity boundary condition	murali	CFX	5	August 3, 2012 08:56
boundary condition for derivative of velocity	Daiga	CFX	2	December 7, 2009 17:11
Velocity boundary condition problem related	dmoroian	OpenFOAM Running, Solving & CFD	3	October 16, 2006 08:46
On the velocity inlet boundary condition	mini	FLUENT	2	June 5, 2005 20:50
Boundary condition for intermediate velocity	Yiling	Main CFD Forum	3	June 15, 2002 23:48