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Computational Details:

"Flow through the characters 'CB' at high Reynolds number" Back to >>Flow through the characters 'CB' at high Reynolds number<<


Description of the flow problem
Description of the spatial discretization
Description of the temporal discretization
Computer requirements
Mathematical details




Description of the flow problem

  • height of the characters: 2
  • width of the characters: 4
  • thickness of the characters: 0.1
  • inflow speed 1 at the left side
  • natural outflow at the rigth side
  • zero speed at the walls
  • inflow temperature 1 at the left side
  • natural b.c.'s for temperature at the walls
  • initial condition at t=0: starting from rest
  • viscosity parameter: 1/nu=100,000




Description of the spatial discretization

  • coarse mesh (=level 1): 64 cells, 130 vertices, 450 d.o.f.'s



  • uniform refinements with exact boundary adaption
  • visualization on level 5: 16,384 cells, 17,425 vertices, 84,000 d.o.f.`s
  • computational mesh on level 7: 262,144 cells, 266,305 vertices, 1,319,040 d.o.f.`s
  • nonconforming nonparametric rotated bilinear fem's (meanvalue version), UPW




Description of the temporal discretization

  • equidistant time stepping for computation with k=0.003703704
  • equidistant time stepping for visualization with k= 0.100000001 (= 1 frame)
  • Total time T= 30 seconds corresponds to 8,100 time steps
  • fractional step theta scheme




Computer requirements

  • date: 04/27/99
  • simulation by: J.F.Acker/C. Becker
  • visualization by: J.F.Acker
  • SUN ULTRA1/140MHZ 224 MB, 614,756 seconds
  • GMV data: 750 MB
  • Software: FEATFLOW1.1 (BOUSS)




Mathematical details

  • For more details about numerical and algorithmic aspects see the `Mathematical Background' in the FEATFLOW manual or visit our paper archive for much more details.
  • The problem-specific data for the applied software version including parameter files and input data can be downloaded here!




Please send any comments and suggestions to: featflow@featflow.de