Search found 4812 matches

by raback
12 Jun 2011, 23:55
Forum: General
Topic: surface tension (Marangoni effect) driven 2-phase flows
Replies: 1
Views: 3110

Re: surface tension (Marangoni effect) driven 2-phase flows

Hi

I would think that there is no problem that the surface tension is in an internal boundary. This doesn't of course mean that there couldn't be some other problems.

-Peter
by raback
12 Jun 2011, 23:47
Forum: ElmerSolver
Topic: A circumferentially extruded modelling
Replies: 10
Views: 5600

Re: A circumferentially extruded modelling

Hi

The periodic BC needs reference to its counterpart. Hence you should set in your case

Code: Select all

Periodic BC = 20
It also sounds that you're not getting much output. You might increase the "Max Output Level" to ten or so.

-Peter
by raback
12 Jun 2011, 01:51
Forum: ElmerSolver
Topic: Heat transfer in Elmer / OpenFOAM
Replies: 20
Views: 16770

Re: Heat transfer in Elmer / OpenFOAM

Hi Walter Number is the primary method of identification of boundary element groups. I don't really know what tool to recommend. Personally I would try to put everything into one condition. For example, if you have dependency on time and on angle you can make a 2D table, read it in the first time, a...
by raback
12 Jun 2011, 01:40
Forum: ElmerSolver
Topic: mechano-acoustic coupling
Replies: 3
Views: 3512

Re: mechano-acoustic coupling

Hi

At least hierarchical coupling from acoutic to elastic, or elastic to acoustic should be possible rather easily (when you know what you're doing...). Perhaps we could write a minimalistic example some day. Seems to be a recurring wish.

-Peter
by raback
12 Jun 2011, 01:35
Forum: ElmerPost
Topic: Wrong (?) results
Replies: 7
Views: 8148

Re: Wrong (?) results

Hi Karel

Elmer menu structure is fully programmable so you can add the nodal load to the menus even by yourself. Just edit the corresponding .xml file in edf directory and add "varname Load" to boundary condition menu definition.

-Peter
by raback
12 Jun 2011, 01:28
Forum: ElmerSolver
Topic: Heat Flux BC at Interface
Replies: 3
Views: 2528

Re: Heat Flux BC at Interface

Hi

It may be that the point BCs for nodal loads are omitted. After all in 2D and 3D the Neumann condition cannot be 1D. However, you might use "Temperature Load" as well since the integration weight is one for a node element.

-Peter
by raback
12 Jun 2011, 01:24
Forum: Installation & compilation
Topic: question from beginner
Replies: 1
Views: 2644

Re: question from beginner

Hi

You could try reading the documentation: startin from the Tutorials to get the idea, and the continuing to Models Manual and Solver Manual for more details on the topics you're interested in.

-Peter
by raback
10 Jun 2011, 17:31
Forum: General
Topic: Memory Requirement
Replies: 4
Views: 4385

Re: Memory Requirement

Hi The iterative methods use much less memory, particularly in 3D umfpack is a memory hog. So you could try some of the Krylov methods for your problem as well. In fact the memory consumption of direct methods may grow superlinearly with the problem size. Why won't you just run some typical case and...
by raback
10 Jun 2011, 17:05
Forum: ElmerSolver
Topic: Save Scalars file
Replies: 15
Views: 11198

Re: Save Scalars file

Hi You should give the filename in order to save a file. Otherwise it is just echoed. By default, all values at point are saved so no need to specify the variables. If you do so, use "Pressure Wave 1" instead. The '.' is just used saved for ElmerPost instead of ' ' since it cannot deal wit...
by raback
09 Jun 2011, 17:05
Forum: ElmerSolver
Topic: Heat transfer in Elmer / OpenFOAM
Replies: 20
Views: 16770

Re: Heat transfer in Elmer / OpenFOAM

Hi Walter The default user defined subroutine interface includes some Elmer structures that might be difficult to address in C. Hence I would think that it would be easier to wrap the C code in piece of Fortran passing only some primitive data types. Perhaps I understood wrong. What I meant that if ...