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Laminar-Two-Phase-Flow - Filling of a Pot
Posted Nov 25, 2012, 8:19 AM EST Fluid, Computational Fluid Dynamics (CFD) Version 4.3 2 Replies
I've done a lot of simulations with comsol 4.3 and they worked. My modell is a pot which is filled with water.I'm using the laminar two phase flow in 2D with the phases water and air. i have two boundaries inlet of water and outlet of air. Now I have following problems:
(1) Sumtimes the air turnes its direction and my defined air outlets become inlets. the results are problems with the singularity. i could sometimes handle that by putting an little air inlet next to the air outlet. but this not allways helps.
(2) I change the inflowvelocities in different simulations. Now sometimes the pot is filled much to fast as it shoul. But i haven't changed anything in the settings except the velocity. The flow is incompressible. Does anyone know, why this happens?
I hope anyone can understand me :)
I'm glad for every answer!