Search found 177 matches

by spacedout
14 Feb 2021, 21:38
Forum: General
Topic: A mesh for each body
Replies: 5
Views: 2724

Re: A mesh for each body

Thank you Kevinarden, I had completely overlooked the -unite option under ElmerGrid. And perhaps one day I can use those mortar conditions for turbomachinery studies where of course rotor-stator meshing involves non-coincident nodes. And, Peter, to answer your question, I believe Gmsh can only creat...
by spacedout
14 Feb 2021, 03:07
Forum: General
Topic: A mesh for each body
Replies: 5
Views: 2724

A mesh for each body

Good evening Say the domain is divided into 2 contiguous bodies. There would be a Body 1 section and a Body 2 section in the .sif I create the mymesh.msh file from Gmsh and the .sif contains Header Mesh DB "." "mymesh" End where the mymesh folder contains the files created from t...
by spacedout
31 Jan 2021, 23:45
Forum: General
Topic: how to restart under mpi
Replies: 7
Views: 2831

Re: how to restart under mpi

As I dont understand the effect of Output Intervals on other output routines. this is what I did: Simulation section ..... Timestep Intervals(1) = 1200000000 Timestep Size = Variable deltaT Real MATC "tx(0)" Output Intervals(1) = 0 Output File = "case.result" Binary Output = Logi...
by spacedout
30 Jan 2021, 23:48
Forum: General
Topic: how to restart under mpi
Replies: 7
Views: 2831

Re: how to restart under mpi

Sorry but what is the syntax to save just the last timestep for the Result file ? Could not find it in the Elmer Solver manual.
I guess it is a command to overwrite it at every time step.
Regards
Marc
by spacedout
30 Jan 2021, 21:48
Forum: General
Topic: how to restart under mpi
Replies: 7
Views: 2831

Re: how to restart under mpi

It would be nice though if we could dispense with .result files altogether as they become ever larger as the simulation progresses since data from subsequent timesteps get appended to it. The .vtu contain the same information but as individual files, one for each timestep. It is more burdensome to o...
by spacedout
30 Jan 2021, 07:11
Forum: General
Topic: how to restart under mpi
Replies: 7
Views: 2831

Re: how to restart under mpi

Well from trial and error, I found out that only

Restart File = "case.result"

is accepted by ElmerSolver_mpi
by spacedout
30 Jan 2021, 00:30
Forum: General
Topic: how to restart under mpi
Replies: 7
Views: 2831

how to restart under mpi

Hi again if I ran mpirun -np 4 ElmerSolver_mpi myfile.sif up to the allotted time limit on the system, can i restart the simulation from the generated .vtu files with a single line Restart File = "case_t1000.pvtu (assuming my latest saved time index was 1000 for the sake of example) or do I hav...
by spacedout
30 Jan 2021, 00:11
Forum: General
Topic: How does ElmerSolver_mpi handle serial solvers
Replies: 3
Views: 1751

Re: How does ElmerSolver_mpi handle serial solvers

Actually I umwittingly lied. I do change field values at certain times: SUBROUTINE MySolver( Model,Solver,dt,TransientSimulation ) USE DefUtils ........ Print *, "voltage is", voltage IF(t==0)THEN CALL initaveEHD() open(1, file = 'timedata.txt', status = 'replace') ENDIF CONTAINS SUBROUTIN...
by spacedout
29 Jan 2021, 06:43
Forum: General
Topic: How does ElmerSolver_mpi handle serial solvers
Replies: 3
Views: 1751

How does ElmerSolver_mpi handle serial solvers

Good evening

Two of my solvers work on global variables only and also open and write to files on disk. If I have 4 partitions, I dont want ElmerSolver_mpi to call them 4 times per time step and I dont know if it is possible to call them only once per time step.

Thanks anyhow
by spacedout
24 Jan 2021, 04:23
Forum: General
Topic: unitialized time step size
Replies: 3
Views: 1717

Re: unitialized time step size

I thought initial and boundary conditions were meant to be used for field variables only. Following your suggestion, I initialized deltaT in the initial condition section and the code now works just fine.
Great thanks,
Marc