Search found 103 matches

by spacedout
08 Aug 2020, 05:13
Forum: Software development
Topic: a note on code efficiency
Replies: 2
Views: 2231

a note on code efficiency

I am looking at Fig 18.5 in ElmerSolverManual.pdf It strikes me that ElmerSolver will call the solver subroutine every time step for a transient simulation and therefore the same .sif file will be inspected every timestep before the nonlinear iteration loop. Wouldn't it be faster to scan that config...
by spacedout
06 Aug 2020, 05:05
Forum: Bug reports
Topic: MeshChanged undefined in solver_t [SOLVED]
Replies: 3
Views: 1784

Re: MeshChanged undefined in solver_t

It is kind of incredible but the file FlowSolver.F90 I downloaded onto my Win7 laptop was corrupted ! IF ( .NOT.AllocationsDone .OR. Solver % MeshChanged ) THEN was actually supposed to be IF ( .NOT.AllocationsDone .OR. Solver % Mesh % Changed ) THEN as I found out from another file FlowSolver.F90 i...
by spacedout
05 Aug 2020, 21:30
Forum: Bug reports
Topic: MeshChanged undefined in solver_t [SOLVED]
Replies: 3
Views: 1784

Re: MeshChanged undefined in solver_t

No, I am not sure. Under Windows 7, the .dll library files have a date modified of April 8 2020 whereas the .F90 source files have a date modified of April 17 2020 . The only reason I want to compile FlowSolve.F90 is that I need to change the continuity equation to drho/dt +div(V*rho) = S where S is...
by spacedout
05 Aug 2020, 04:44
Forum: Bug reports
Topic: MeshChanged undefined in solver_t [SOLVED]
Replies: 3
Views: 1784

MeshChanged undefined in solver_t [SOLVED]

Hi everybody When I try to compile FlowSolve.F90 with elmerf90 under either Linux or Windows 7, I get an error about a variable MeshChanged undefined in structure solver_t. A look at http://www.elmerfem.org/doxygen/structtypes_1_1solver__t.html indeed confirms that it is not part of this structure. ...
by spacedout
04 Aug 2020, 20:31
Forum: General
Topic: How to learn about basic FEM concepts
Replies: 2
Views: 1361

Re: How to learn about basic FEM concepts

Thank you ever so much. I am glad to hear that permutations are used for code optimization. I was afraid at first that it had something to do with some deep theoretical knowledge of FEM. Speaking of the latter, I downloaded THE H, P AND H-P VERSION OF THE FINITE ELEMENT METHOD BASIC THEORY AND APPLI...
by spacedout
02 Aug 2020, 21:36
Forum: General
Topic: How to learn about basic FEM concepts
Replies: 2
Views: 1361

How to learn about basic FEM concepts

Hi Q1. What is the mathematical or physical meaning of permutations in the Elmer code - the following crops up everywhere: Solver % Variable % Perm Q2. Because of the pandemic, my library is closed and I dont have access to the references [3] Szabo & Babuska , [4] Solin et al listed at the end o...
by spacedout
12 Apr 2020, 04:04
Forum: ElmerSolver
Topic: boundary condition at a dielectric interface
Replies: 5
Views: 1933

Re: boundary condition at a dielectric interface

The link was enlightening. Well I'm glad Elmer seems to be able to take care of a surface charge density that varies with location on an arbitrary surface. I am now going to study the tutorials before writing my own program and before starting threads on Elmer forums.

Yours truly
by spacedout
12 Apr 2020, 03:56
Forum: General
Topic: where are the tutorials located?
Replies: 4
Views: 2040

Re: where are the tutorials located?

I apologize. I should have realized from their sizes that those two .tar.gz contained the case studies themselves. It also appears to me that the ElmerGUI/samples subdirectories contain several of them as well.

Great many thanks
by spacedout
11 Apr 2020, 04:13
Forum: General
Topic: where are the tutorials located?
Replies: 4
Views: 2040

Re: where are the tutorials located?

Hello Kevinarden Sorry, I should have been more careful and entitled the request as where are the directories mentioned in the tutorial pdf ? (You are pointing me to the ElmerTutorial.pdf which I had already downloaded a week ago). I just cannot figure out which installation contains them. Thanks to...
by spacedout
10 Apr 2020, 20:46
Forum: General
Topic: where are the tutorials located?
Replies: 4
Views: 2040

where are the tutorials located?

Good afternoon This may sound like a very newbie question. However, I have no choice but to ask since I've hit-a-wall. I have just installed the nightly windows executable under the Program Files (x86) folder but I cannot find any of the directories mentioned under the ElmerTurorlal.pdf. My laptop i...