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Negative pressure evaluation using Darcy's law
Posted Mar 24, 2021, 9:03 a.m. EDT 1 Reply
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Hi
I am trying to model and simulate the process of cooking a steak on a frying pan.
I am currently using both "heat transfer in porous media" and "darcy's law" to model convection and conduction. I have implemented a piecewise function to simulate the flipping of the steak, to flip the boundary temperatures every 30 sec/1 min. I will validate the model by using a special temperature-controlled stove.
My problem is, that Darcy's law evaluates negative pressure on the cold side of the steak after the flip. I have specified an initial pressure of 1 atm (I have adjusted this) and 1 atm as the boundary pressures. Do you have any idea if this is a numerical problem of finding a proper convergence point, or is it something else, like setting up the physics package differently?
I couldn't upload an animation of my issue here, but I uploaded it externally here: https://gifyu.com/image/ffw4
Thanks in advance!
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I resolved this issue myself by adjusting some of the material properties (more specifically increased the permeability by a factor of 10, as it is in the range of 10e-19 to 10e-17), and the convergence point was in a reasonable pressure range.