negative pressure
Hi all.
I simulated one heat sink that has some microchannels. and boundary conditions: 1 velocity inlet for fluid inlet 2 pressure outlet for fluid outlet. and two thermal boundary for heat sink. when converge my RUN pressure @ out let become negative.!???? please help me. |
You mean the pressure at the pressure outlet becomes negative?
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But this doesn't make any sense to me. If you set the outlet pressure to some value (as a BC), how can this value change during your simulation?
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It is possible if there were massive reversed flow at the outlet but then the appropriateness of outlet B.C. might be in question.
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yes my RUN become converge. But pressure value @ outlet is negative.for example pressure @ inlet B.C be 5687 Pa. and @ Outlet B.C be -879 Pa.
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Please post images of the velocity and pressure contours and of the residuals.
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