|August 15, 2013, 03:04||
the static pressure at one outlet is negative?
Join Date: Oct 2012
Posts: 65Rep Power: 4
Hi, my friends, I simulated the pressure distribution in a geometry with pushed air in it. But I got a negative pressure at one outlet. That means the static pressure at this outlet is lower than the static pressure at reference point (101325 Pa). But I guess the pressure at this outlet should be higher than 101325. Because air is pushed from the bottom to the top of the geometry. Maybe the inlet is too close to the outlet. Then I extended the outlet to 5 times of the distance from the original position. And the static pressure are positive .But the mass flow rate at this outlet is positive， which is different with other two outlets.
My questions are: 1. why is the mass flow rate is positive at this outlet? 2. Is the pressure at the original outlet reliable after I extended it to a far distance?
I am so forwarding to your help! Thanks so so much!
The original geometry is like this: Attachment 24418
|Thread||Thread Starter||Forum||Replies||Last Post|
|Pressure Driven Supersonic Flow in Converging-Diverging Nozzle||cdm||OpenFOAM Running, Solving & CFD||4||July 21, 2013 16:24|
|Modeling transient negative pressure (suction pressure) in outlet||N_mrtz||FLUENT||1||July 18, 2013 20:59|
|Question Concerning Pressure Value (Pressure outlet) and Reference Pressure (Physics)||andy_flow||STAR-CCM+||1||July 9, 2013 08:44|
|BlockMesh FOAM warning||gaottino||OpenFOAM Native Meshers: blockMesh||7||July 19, 2010 14:11|
|what the result is negatif pressure at inlet||chong chee nan||FLUENT||0||December 29, 2001 06:13|