|December 3, 2015, 10:50||
pressureGradientExplicitSource fvOptions - Problems on different meshes
Join Date: May 2015
Posts: 68Rep Power: 3
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.
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:
Every help is appreciated!
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