Elmer Discussion Forum

I was reading the chapter of Navier-Stokes equations in the models' guide, but I did not understand the section concerning the relaxation factor.
How does it enter in the Newton/Picard method for the resolution of the non-linear term? Thanks in advance for your help.
Regards,
Andrea

Hi, I have a theoric question this time. By reading the Elmer models manual, I don't understand how the superposition between the induced magnetic field B^i and the external magnetic field B^e appears in the induced magnetic equation B=B^i+B^e Indeed, according to Faraday’s law of induction, the rel...

Dear Andrea, The test example (https://github.com/ElmerCSC/elmerfem/tree/devel/fem/tests/LevelsetFallingDrop) illustrates the concepts and techniques for using level set method in Elmer software. Thanks, annier, I gave a look at the repository, but I didn't find any explication about the reinitiali...

How Can I compute the Courant number for the level set? Probably my question is trivial. I know that the Delta_x(grid dimension), Delta_t (time step) and velocity V appear in the Courant number, but what is that V? How can I compute in a simulation? Regards, Andrea The V in Courant number (C) = V* ...

Hi,
I read the manual about the reinitialization for the level set method, but, unfortunately, I didn't understand the technique used in Elmer. Does anyone know something about it? Thanks in advance.
Regards,
Andrea

Hi,
I defined a variable for interface in Level set solver. I want to export it just to visualize the interface with respect to my y axis. How may I export it? I defined the interface by the function . Thanks in advance for your help.
Regards,
Andrea

In MATC? You can refer to other defined MATC functions in your MATC. $ function B(y) { _B = 3*y+1 } $ function h(y) { _h = 4*y+6 } $ function V(x,y) { _V = cosh(B(y)*h(y)) + sinh(x) } .... Boundary Condition .... var = Variable Coodinate 1, Coordinate 2 Real MATC " V( tx(0), tx(1) ) " ......

In MATC? You can refer to other defined MATC functions in your MATC. $ function B(y) { _B = 3*y+1 } $ function h(y) { _h = 4*y+6 } $ function V(x,y) { _V = cosh(B(y)*h(y)) + sinh(x) } .... Boundary Condition .... var = Variable Coodinate 1, Coordinate 2 Real MATC " V( tx(0), tx(1) ) " ......

Hi, Is there a way for Elmer to create a 2D functional? I explain my case with a simple example. I have three functions: V, B,h B=3y^2 +1 h=4y+6 V=cosh(Bh)+sinh(x) I know that I must use the notation tx, but in this case, how can I specify the functions B and h before calling V? it's just an example...

Hi,
Are there any tips to improve the convergence just for the Level set solver?
Regards,
Andrea