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-   -   Unphysical jump in pressure at the outlet predicted by rhoCentralFoam (https://www.cfd-online.com/Forums/openfoam-verification-validation/165685-unphysical-jump-pressure-outlet-predicted-rhocentralfoam.html)

sathya123 January 23, 2016 08:49

Unphysical jump in pressure at the outlet predicted by rhoCentralFoam
 
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Hello,
My name is Sathya, I had a question regarding the results of a simulation I ran. This corresponds to the well known case of transonic flow over a bump in a channel (the ONERA bump). I considered inviscid 2-D flow, and applied :
1. Slip boundary conditions at the top and bottom of the channel
2. 2-D (empty) at the front and back.
3. Total pressure and total temperature of 96000 Pa and 300 K at the inlet
Also, applied the pressureDirectedInletVelocity, to compute the inlet velocity perpendicular to the inlet normal, given a prescribed static pressure at the outlet.
4. Prescribed a static pressure of 57000 Pa.
I ran the case on the density based rhoCentralFoam solver.
The results were un-physical in the sense that a sudden rise in pressure to the prescribed outlet pressure was observed.
I will put up a plot of the 2D pressure plot with the post.
Any suggestions/comments on the possible error in modelling or unsuitability of the solver would be appreciated


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