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[mesh manipulation] renumberMesh results in a slower model |
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Ali
Join Date: May 2016
Location: Sydney, Australia
Posts: 19
Rep Power: 10 ![]() |
I am running an OpenFOAM test using interFoam, teh strange thing is that after applying renumberMesh, my model gets about 30% slower. I am using 288 cpus, checked with OF8 and Of/2006, both show the same defficiency after renumberMesh.
here is teh output of renumberMesh: " /*---------------------------------------------------------------------------*\ ========= | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox \\ / O peration | Website: https://openfoam.org \\ / A nd | Version: 8 \\/ M anipulation | \*---------------------------------------------------------------------------*/ Build : 8-c67e2b482b0f Exec : renumberMesh -overwrite -parallel Date : May 19 2022 Time : 14:17:19 Host : "gadi-cpu-clx-2906.gadi.nci.org.au" PID : 2191322 I/O : uncollated Case : /g/data/rr38/from_short_rr38/rr38/aliv/43803371/parametricModel/Surflakes_v2_layout16_runs/Island_v2_Layout16_St3.0 nProcs : 288 Slaves : 287 ( "gadi-cpu-clx-2906.gadi.nci.org.au.2191323" "gadi-cpu-clx-2906.gadi.nci.org.au.2191324" "gadi-cpu-clx-2906.gadi.nci.org.au.2191325" ... "gadi-cpu-clx-2914.gadi.nci.org.au.733733" ) Pstream initialized with: floatTransfer : 0 nProcsSimpleSum : 0 commsType : nonBlocking polling iterations : 0 fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10) allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh for time = 0 // using new solver syntax: pcorrFinal { solver GAMG; tolerance 1e-07; relTol 0; smoother DIC; nPreSweeps 0; nPostSweeps 2; nFinestSweeps 2; cacheAgglomeration true; nCellsInCoarsestLevel 10; agglomerator faceAreaPair; mergeLevels 1; } Mesh size: 38486181 Before renumbering : band : 134955 profile : 1.80501e+11 Using default renumberMethod. Selecting renumberMethod CuthillMcKee Reading geometric fields Reading volScalarField nut Reading volScalarField p_rgh Reading volScalarField k Reading volScalarField epsilon Reading volScalarField omega Reading volScalarField alpha.water Reading volScalarField nuTilda Reading volVectorField U Reading pointVectorField pointDisplacement Selecting solid-body motion function tabulated6DoFMotion Renumbering processor cell decomposition map cellProcAddressing Renumbering processor face decomposition map faceProcAddressing Renumbering processor point decomposition map pointProcAddressing After renumbering : band : 5357 profile : 8.42177e+10 Writing mesh to "constant" End Finalising parallel run " Any help would be highly appreciated. |
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Tags |
efficiency, interfoam, openfoam, renumbermesh |
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