Elmer Discussion Forum

Hi Anil I did an timestep array for the first 1e-8 s, I used a resolution of 2.5e-10 s... maybe that is not yet high enough as resolution? Timestepping Method = BDF BDF Order = 1 Output Intervals (20) = 1 5 4 5 10 Timestep Intervals (20) = 40 80 40 70 490 Timestep Sizes (20) = 2.5e-10 5e-10 2.5e-9 5...

Hi, it is possible... i did it like this (for constants) ! Read constant scalar from Constants-block: !-------------------------------------------- ! REAL(KIND=dp) :: kB LOGICAL :: Found k = GetConstReal(Model % Constants, "k", Found) IF(.NOT.Found) CALL Fatal("MySolver", "U...

Hi Tom, I thought my resolution is high enough, but maybe you're right. I'd like to give it a try with a higher resolution. However, how do you make your soubroutine? I use an array for the timestepping, that is as I have to admit a not very sophisticated solution. Maybe you could check my resolutio...

Hello again I am trying to simulate the time dependent heat developement (1D) due to laser pulses. Therfore I use a body force that simulates four gaussian pulses (time dependent intensiy is gaussian shaped) with a pulselength of 5 ns and a repetition rate of 40 kHz (time between two pulses is 40 us...

Hi Matthias

It seems to work - THX

mauc

Hi Matthias

This is exactly what I intendet to try.

Danke
Claudia

P.S. I'll post the feedback as soon as my simulation is finished (and that might take a while).

Thanks I'll give it a try.... I'll post again once I figured out if it works or not. But how can I assign different losses to the same boundary? Like Heat Transfer and radiative losses, for example? I did already perform simulations with more than one BC on a boundary. Does the solver then only acce...

Hi I have a geometry with two "active" boundaries (101 and 102) A heat flux is applied to 101 and Heat Transfer Losses appear on 101 and 102. If I give my boundaries the tags 1 and 2 - the simulation does not work - I do only receive 300K initial condition If, on the other hand I use the t...

Hi

I once had a problem with "jumping" extreme temperature values. Changing the
Nonlinear System Relaxation Factor
helped in my case. Though I have to admit that it was not 1 before and I set it to 1 again.

mauc

Hi Annier, Peter Yes, I did refer to the MATC Manual and others. Thanks for the hint with the UDF, Peter. I am trying to avoid that, as I am not good in programming and never used Fortran in my whole lifetime :-) However I finially found why it did not work.... 1st the backslashes \ are not allowed ...