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Inlet pressure boundary condition not allowing COMSOL to converge
Posted 2016年5月5日 GMT-4 23:19 Fluid & Heat 0 Replies
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In my simulation (file attached here), I'm modeling a slight variation of the 2D axi-symmetric 'stirrer in a cylinder' situation, which is on COMSOL model library.
In my variation, there is applied pressure on the top of the cylinder in which the stirrer rotates. Below the cylinder-stirrer setup is a highly impermeable layer (modeled by Brinkmann equation) through which the fluid has to pass.
This is a simulation of a lab setup, so I know that the applied pressure at the top is usually 4 bar. The outlet below the membrane is open to atmosphere (so the fluid has to pass though the cylinder, through the, membrane and then the open outlet) .
However the pressure boundary condition at inlet does not allow comsol to converge.
I've seen this happen even in a simple pipe flow situation where beyond a certain max pressure, COMSOL can't converge.
Please provide me suggestions!
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Hello Yagnaseni Roy
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