interFoam Simulation speed and convergence graph
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Hi everyone!
I can be counted as new to OpenFOAM and have been working on various setups for a ship flow simulation using interFoam. I need help with convergence scheme(graph) and simulation time. I have uploaded a gnuplot convergence graph picture, the duration for this amount of process takes about 2 days. When you compare the case to other software on same hardware (such as Numeca) it is very very slow(numeca gets results in 4-5 hours). Is this something natural for OpenFOAM or am i somehow using very high precision tolerance values? Also in numeca convergence graph plots about three big up&down wave curves and then starts an obvious convergence interval and repeats it, so you are sure that your simulation has converged to a value. But with interFoam i never get that obvious convergence plot (maybe i need weeks for it in current solver settings). I can share my OpenFOAM dictionaries (didn't do it now due to lack of knowledge about which ones you need to know). -I am generally having around 3.5million mesh cells -Using 5 or 6 topoSet dictionaries for refinement The hardware I use: * 2 x Intel Xeon E5-2630-v3 @2.40GHz (total 16physical cores) * 128Gb Ram * 1TB NVMe M.2 SSD 3300mb/s read, 2800mb/s write (connected via PCIe card) **Also when i check processor state it always runs in base frequency, is there any way to get cores to turbo frequency? Any help appreciated |
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