|
[Sponsors] |
March 25, 2010, 14:11 |
Static Pressure
|
#1 |
New Member
rofluent
Join Date: Feb 2010
Posts: 10
Rep Power: 16 |
Hi everyone,
I am doing a blood flow simulation in fluent with velocity inlets and outflow boundary conditions. I expect the pressure drop from the inlets to the outlets to be no more than 6-8 mm Hg (800 Pa). When I run the simulation, the contours of static pressure show the minimum value as -2500 Pa ( at the outlets) and the max value to be the somewhere around 3200 Pa ( at the inlets), making the pressure drop 3200 + 2500 = 5700 Pa. I am not sure whats going on with the static pressure as the velocity contours look fine. Did anyone face this problem? I would deeply appreciate any help. Thanks, Rohini |
|
March 25, 2010, 16:07 |
|
#2 |
Senior Member
karine
Join Date: Nov 2009
Posts: 158
Rep Power: 16 |
Hi
how did u estimate ure pressure drop (the value of 800 Pa)?? from correlations??? correlations are done for fully developped flows: 1-as ure flow is not fully developped near the inlet, it is normal that u get large pressure drops in this region, especially because u are imposing a constant velocity profile ( the velocity passes quickly from the value V that u imposed to 0 on the wall) 2-to verify ure simulation, compare the correlation to the numerical pressure drop only in the region where the flow become fully developped Finally, u must pay attention that blood is not a newtonian fluid. So choose carefully ire correlations. Regards |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
simple model, difficult outlet | Eric | CFX | 7 | May 23, 2014 08:13 |
Total and Static Pressure drop | Jaggu | FLUENT | 3 | December 9, 2008 06:03 |
How to achieve constant static pressure in inlet? | Zou Jianfeng | FLUENT | 0 | October 21, 2008 01:55 |
Setting static pressure as the inlet BC | ruined | FLUENT | 1 | March 21, 2008 14:57 |
what the result is negatif pressure at inlet | chong chee nan | FLUENT | 0 | December 29, 2001 05:13 |