hydrostatic pressure

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 August 29, 2001, 23:48 hydrostatic pressure #1 Amanda Guest   Posts: n/a Hi! In FLUENT, do the viscous models take care of the hydrostatic pressure? for exp, i have a close basin without any inflow and outflow, just run the laminar model, i can not observe the hydrostatic pressure distribution in the vertical direction. Anybody can help?

 August 30, 2001, 00:34 Re: hydrostatic pressure #2 david Guest   Posts: n/a A) Have you considerd g ? gradivational accelation ? B) Put a right value and direction in operating conditons C) Solve again, and check the hydrostatic pressure now. DC

 August 30, 2001, 01:53 Re: hydrostatic pressure #3 Amanda Guest   Posts: n/a yes. i have already turn the gravity on. but the pressure appears to be zero

 August 30, 2001, 02:10 Re: hydrostatic pressure #4 John C. Chien Guest   Posts: n/a (1). Can you get a sample case from the vendor? (2). If what you are saying is true, then you must be on the ISS (space station), or there is a black hole somewhere.

 August 30, 2001, 04:53 Re: hydrostatic pressure #5 Anthony Wachs Guest   Posts: n/a Hi, I already experienced that frustrating situation but I finally found the answer. The reason why you did not manage to see the hydrostatic pressure distribution might probably be the fact that you did not specify the operating density. To see the hydrostatic pressure distribution, you are to specify a operating density of 0. Actually, the operating density is a kind of reference density used by the solver to take into account the gravity source term, that can be written as : (ro(fluid)-ro(oper))*g*V where ro(fluid)=density of the fluid you consider ro(oper)= operating density g=gravity acceleration V=volume By defaults, if you do not specify ro(oper), the solver takes the same value as the fluid considered, e.g. ro(oper)=ro(fluid), then your gravity source term vanishes. That's why you could not see the hydrostatic pressure distribution. If you set ro(oper)=0, it will work !! Hope it might help Anthony FJSJ, pezarello86, mohammad hossein and 3 others like this.

 September 3, 2001, 04:23 Re: hydrostatic pressure #6 Amanda Guest   Posts: n/a Der Anthony, Thank you very very much! I solve the problems with your help!

 April 20, 2016, 11:00 #7 New Member   Baptiste Calmette Join Date: Mar 2016 Posts: 1 Rep Power: 0 Thank you very much!!! I have tried to solve this problem and thanks to your tip I solved it. I really appreciate it.

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