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

## Search found 176 matches

- 17 Sep 2021, 17:59
- Forum: ElmerSolver
- Topic: Relaxation Factor
- Replies:
**1** - Views:
**1139**

- 09 Sep 2021, 18:10
- Forum: ElmerSolver
- Topic: Induction Magnetic Equation
- Replies:
**1** - Views:
**1204**

### Induction Magnetic Equation

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...

- 04 Sep 2021, 19:37
- Forum: ElmerSolver
- Topic: Level set Reinitialization
- Replies:
**2** - Views:
**1476**

### Re: Level set Reinitialization

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...

- 04 Sep 2021, 19:33
- Forum: ElmerSolver
- Topic: Level set Courant number
- Replies:
**3** - Views:
**1789**

### Re: Level set Courant number

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* ...

- 01 Sep 2021, 19:59
- Forum: ElmerSolver
- Topic: Level set Reinitialization
- Replies:
**2** - Views:
**1476**

### Level set Reinitialization

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

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

- 08 Aug 2021, 23:48
- Forum: ElmerSolver
- Topic: Export a defined variable
- Replies:
**1** - Views:
**1286**

### Export a defined variable

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

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

Code: Select all

` _h`

Regards,

Andrea

- 06 Aug 2021, 18:10
- Forum: ElmerSolver
- Topic: Create a 2D functional
- Replies:
**4** - Views:
**1256**

### Re: Create a 2D functional

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) ) " ......

- 06 Aug 2021, 17:57
- Forum: ElmerSolver
- Topic: Create a 2D functional
- Replies:
**4** - Views:
**1256**

### Re: Create a 2D functional

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) ) " ......

- 06 Aug 2021, 15:37
- Forum: ElmerSolver
- Topic: Create a 2D functional
- Replies:
**4** - Views:
**1256**

### Create a 2D functional

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...

- 05 Aug 2021, 10:57
- Forum: ElmerSolver
- Topic: Level set convergence
- Replies:
**0** - Views:
**2112**

### Level set convergence

Hi,

Are there any tips to improve the convergence just for the Level set solver?

Regards,

Andrea

Are there any tips to improve the convergence just for the Level set solver?

Regards,

Andrea