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-   -   result in negatif value in pressure (http://www.cfd-online.com/Forums/fluent/29201-result-negatif-value-pressure.html)

chong chee nan December 30, 2001 05:07

result in negatif value in pressure
 
hi

for pipe flow, i set the inlet boundary as Velocity Inlet, and outlet boundary as Outflow, on the Initial Window i set compute from inlet boundary with initial gauge pressure = 13332Pa and x-velocity = 0.2m/s. Then i set the Outlet with flow rate weighting = 1. after simulated the pressure at the inlet(<>-75Pa) and outlet(-153Pa) shown in negatif value. what are the procedure and formula used to get the negatif value. The condition under simulated were laminar, steady, 2d, segregated solver and newtonian fluid.

HVN December 30, 2001 11:06

Re: result in negatif value in pressure
 
In cfd software, you always use the relative pressure. So you could have a negative relative pressure with a positive pressure.


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