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pressureGradientExplicitSource fvOptions - Problems on different meshes |
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December 3, 2015, 09:50 |
pressureGradientExplicitSource fvOptions - Problems on different meshes
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Join Date: May 2015
Posts: 68
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Hi all,
I am simulating a 2D-rib with periodic boundary conditions where OUTLET data is mirrored to INLET. To keep the mass flow constant I am using pressureGradientExplicitSource in the fvOptions dictionary. Quote:
So obviously I want to keep speed constant at 1m/s. To look at avg(U) I select all cells of my geometry and use plotSelectionOverTime with only statistics chosen, It works fine on a coarse mesh, consisting only of quadratic blocks (AR=1). The velocity oscillates a little but becomes constant quickly at the desired value of 1. But when I try to use a wall refined mesh Velocity drops to 0.8 and remains there giving bad results for my simulation since I have to adjust a sink term for temperature according to mass flow (~velocity). Does anybody has an idea what could cause this strange behaviour? You can download my example calculation here: https://owncloud.tu-berlin.de/public...f8946fcc142237 Every help is appreciated! |
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