Search found 5 matches

by markuss
14 Aug 2023, 15:03
Forum: ElmerSolver
Topic: Intel Security Bug “Downfall” AVX2/AVX512
Replies: 0
Views: 939

Intel Security Bug “Downfall” AVX2/AVX512

Hi, had somebody updated his CPU-Microcode (Intel CPU´s 6th-11th CPU generation in general) because of the Downfall-security-bug? The updated Microcode could decrease the speed for operations with AVX2/AVX512, which are very important for hpc-scientific calculation, if I am right. Some benchmarks be...
by markuss
13 May 2022, 17:02
Forum: ElmerGUI
Topic: Navier Stokes - Incompressible Flow - ke-Model
Replies: 5
Views: 1389

Re: Navier Stokes - Incompressible Flow - ke-Model

Yeah, I think I got it with a viscous layer mesh and some modification in the ke-solver like
http://elmerfem.org/forum/viewtopic.php?p=22933

Thank you for your support :).
by markuss
13 May 2022, 14:29
Forum: ElmerGUI
Topic: Navier Stokes - Incompressible Flow - ke-Model
Replies: 5
Views: 1389

Re: Navier Stokes - Incompressible Flow - ke-Model

Hi :), thank your for your time. The scale factor of my elmer model is correct with 0.4x0.6 - the attached CAD Model (exported STEP from Salome) was wrong. I attached the last mesh with its Density of 1.3e6 nodes and 6.9e6 elements. I think it is fine enough to get a result. In your Model you have t...
by markuss
13 May 2022, 10:35
Forum: ElmerGUI
Topic: Navier Stokes - Incompressible Flow - ke-Model
Replies: 5
Views: 1389

Re: Navier Stokes - Incompressible Flow - ke-Model

Here is the convergence and velocitiy plot
by markuss
13 May 2022, 10:34
Forum: ElmerGUI
Topic: Navier Stokes - Incompressible Flow - ke-Model
Replies: 5
Views: 1389

Navier Stokes - Incompressible Flow - ke-Model

Hi, I have convergence problems with a steady incompressible flow (inlet, outlet and walls) and have tried the turbulence model k-epsilon with different solver settings (tolerances, Linear Solvers and relaxation factors) and mesh densities. But I have still the problem and get in the plot only a sma...