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3D Euler equations - Forward facing step

3 Grid Levels (time t = 4.0)

Results:

Level 0 Level 1 Level 2
Grids 23 27 427
Cells 43392 320256 1395752


Color, schlieren and contour plots of the density (click on pictures to display cuts!)

ffstep3d_bidx.gif   ffstep3d_midx.gif
cuttig plane at z=2.0   cutting plane at z=1.2
ffstep3d_bmidx.gif   ffstep3d_lmidx.gif
cutting plane at y=0.2   cutting plane at x=0.6


Distribution to 4 processors (back left view)

ffstep3d_distr1.gif   ffstep3d_distr2.gif
ffstep3d_distr3.gif   ffstep3d_distr4.gif


Regions of low density (back left view, iso surface at density=0.92)

ffstep3d_3diso092isol.gif


Blocks of the second refinement level (front right view)

ffstep3d_3d2lev.gif


Benchmark


Task P=1 P=2 P=4
s % s % s %
Integration 160927 39.6 40695 49.9 18583 45.5
Flux correction 23030 5.7 1516 1.9 1361 3.3
Boundary setting 68094 16.7 19092 23.4 12921 31.6
Recomposition 118589 29.2 13540 16.6 5748 14.1
Clustering 10790 2.7 2100 2.6 577 1.4
Misc. 25113 6.2 4560 5.6 1653 4.1
Total / parall. efficiency 406543 100.0 81503 249.4 40843 248.8

This particular example benefits significantly from the use of multiple computing nodes, because the size of the calculation causes heavy swapping activity on a single node with 256Mb real memory.


<--- Problem description



-- RalfDeiterding - 06 Dec 2004


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