Search found 3306 matches

by raback
Today, 14:10
Forum: ElmerSolver
Topic: Regarding Stat Elec Solver and Boundary conditions
Replies: 3
Views: 49

Re: Regarding Stat Elec Solver and Boundary conditions

Yes, reference would be ground given either by zero potential or the farfield condiction (assumes spherical potential from origin). -Peter
by raback
15 Nov 2018, 18:18
Forum: ElmerSolver
Topic: New version of StatCurrentSolver
Replies: 0
Views: 23

New version of StatCurrentSolver

Hi There is now a new version of StatCurrentSolver called StatCurrentSolverVec in the devel branch. The idea of the solver has been to include some features that are have been developed recently. As the name implies the most important one is the ability to use vectorized bulk assembly routines. It s...
by raback
15 Nov 2018, 11:18
Forum: ElmerSolver
Topic: Regarding Stat Elec Solver and Boundary conditions
Replies: 3
Views: 49

Re: Regarding Stat Elec Solver and Boundary conditions

Hi The "Capacitance Body" keyword will permutate appropriate combinations of zero and one potentials. Don't specify "Potential" as the two are conflicting. You could specify potential for the farfield condition to give you self-capacity (or use the infinity condition). To summarize if you want to ha...
by raback
15 Nov 2018, 11:13
Forum: ElmerSolver
Topic: Issue with stress calculation using quadratic tetra elements
Replies: 1
Views: 40

Re: Issue with stress calculation using quadratic tetra elements

Hi Janek

Looks ok to me. Found this random picture from google that looks quite similar:

https://homesecurity.press/quotes/stres ... lever.html

-Peter
by raback
14 Nov 2018, 00:50
Forum: ElmerSolver
Topic: problems with MGDynamicsCalc
Replies: 2
Views: 64

Re: problems with MGDynamicsCalc

Hi Marco Had a quick look. I think the problem is that you StatCurrentSolver tries to compute the "Joule heating" field. The CalcFields solver can in principle solve the same field. In fact if the solver is present it tries to do so. Now unfortunately it here fails because the "Joule heating" that e...
by raback
11 Nov 2018, 01:45
Forum: ElmerSolver
Topic: Extract temperature at variable point on boundary
Replies: 6
Views: 104

Re: Extract temperature at variable point on boundary

Hi

It knows it because all parameters on finite element assembly are retrieved on each node of each element, and can depend on any field variable. There is some cost to this but the advantages are huge.

-Peter
by raback
10 Nov 2018, 01:49
Forum: ElmerSolver
Topic: Extract temperature at variable point on boundary
Replies: 6
Views: 104

Re: Extract temperature at variable point on boundary

Hi

If you just want a temperature dependent BC then that is a standard feature of Elmer, for example 2nd order polynomial with MATC

Code: Select all

Boundary Condition 1
  Heat Flux = Variable "temperature"
    Real MATC "1.23*tx^2+2.34*tx+3.45"
You can use Lua expressions, tables and UDFs as well.

-Peter
by raback
09 Nov 2018, 13:14
Forum: ElmerSolver
Topic: Charge relaxation problem
Replies: 5
Views: 198

Re: Charge relaxation problem

Hi Paulo

This solver has been there for some time. Would you have some test case to try it out?

-Peter
by raback
08 Nov 2018, 10:42
Forum: ElmerSolver
Topic: Extract temperature at variable point on boundary
Replies: 6
Views: 104

Re: Extract temperature at variable point on boundary

Hi There are two problems. 1) In the code the "Save Coordinates" are fecthed assuming that it is a constant real array so you cannot let it have any functional dependency. 2) Even if you could there is a syntax issue. The parser will just not replaces "x" with the expression. You should have the "Sa...
by raback
03 Nov 2018, 00:48
Forum: ElmerSolver
Topic: How to specify current direction for a 3D rod that with turns
Replies: 6
Views: 159

Re: How to specify current direction for a 3D rod that with turns

Hi

For current density you can

1) Use StatCurrentSolver or CoilSolver to precompute a current density field, or
2) Use MATC, table (example of Matthias), UDF to give it as a function of position. For circular coils analytical functions involving SIN and COS are typically used...

-Peter