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Coupling between to physics in comsol multiphysics 5.0 (in time)
Posted 2015年2月23日 GMT-5 04:34 Fluid & Heat, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 5.0 0 Replies
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I am trying to model a droplet that impacts on a porous medium and penetrates this porous medium.
The first thing I tried is using two physics: laminar two phase flow level set (for the falling of the droplet and impact) and two phase Darcy's law (to model the penetration into the porous medium).
I managed to model the falling and impacting of the droplet but it won't model the penetration into the porous medium. I also attached a file with the image of the volume fraction at t = 0.035s.
I want to couple the laminar flow and darcy flow in time. At every time step the situation in the laminar flow regime (at and above the porous medium) is the input for the porous medium regime. Thus when the droplet is still in the air, the darcy law should have an input of zero. If the droplet impacts on the plate, the darcy law should see a local inflow in the porous medium.
When I want to run the program, the phase initialization will show an exclamation mark (I also attached an image of this), thus something is wrong. I just want to couple the darcy law with that what is happening above.
Does anyone have an idea?
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Hello Christa Gjaltema
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