AMROC Main     Blockstructured Adaptive Mesh Refinement in object-oriented C++

Backward Facing Step 3D - 3 Grid Levels

Problem description       Results:    3 Levels
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Level 0
Level 1
Level 2
Grids
   40
    53
    248
Cells
88000
334008
1542904



Color, schlieren and contour plots of the density at time t = 0.75 (click on pictures to display cuts!)


cutting plane at z=0
cutting plane at z=1.3
cutting plane at x=1.3


Isosurface of the density (value=1.3) at times t=0.75 and t=1.5 (symmetrical visualization in y- and z-direction)



Isosurface of the density (value=1.0) at times t=0.75 and t=1.5 (symmetrical visualization in y- and z-direction)



Grids of the second refinement level with isosurface at rho=1.0


Benchmark

Task
P=1
P=2
P=4
s
%
s
%
s
%
Integration
22363
 52.5
 7104
 40.0
 3326
 40.0
Flux correction
 1956
  4.6
  373
  2.1
  261
  3.1
Boundary setting
 6722
 15.8
 6931
 39.1
 3606
 43.4
Recomposition
 7547
 17.7
 2343
 13.2
  682
  8.2
Clustering
 1108
  2.6
  332
  1.9
  150
  1.8
Misc.
 2908
  6.8
  654
  3.7
  282
  3.5
Total / Parallel Efficiency
42604
100.0
17737
120.1
 8307
128.2

Computing nodes with 256Mb real memory have been used. Due to memory swapping parallel efficiencies higher than 100% have been achieved.

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last update: 6/1/04