There are many different approaches. Which have to be programmed manually, and nobody wants to do it. For Microstructures containing some grains Multiphase field approaches are the favourites. (not in comsol). Dendritic growth simulation need thermodynmaics coupling containing a lot of data.
If you want to implement it, please tell me.
Kind Regards
Hi, Daniel Höche, thank you!
I am doing simulation of dendritic growth, and I want to use the level set module in comsol.. Now I met a question, I need to calculate the moving interface velocity using the Stefan condition, i.e., rho*L*V=qs-ql, where rho is the density, L is the latent heat, V is the interface velocity, and qs-ql is the heat flux difference across the interface, I know, in comsol, heat flux difference across a boundary can be calculated using the operators "down(), up()", but I don't know how to use them exactly. My current way is defining two variables, for example, qs = down(ht. tfluxx), ql=down(ht. tfluxx) (considering just 1D, ht. tfluxx means total heat flux of x component in version4.0), but I wonder if I just define two variables, how comsol know that "down(), up()" are effective on which boundary. Do you know exactly how to use these two operators? Thank you!