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Computational Details:

"Flow through the character 'j' at high Reynolds number" Back to >>Flow through the character 'j' 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 character: 1.6
  • width of the character: 2
  • thickness of the character: 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): 30 cells, 62 vertices, 212 d.o.f.'s



  • uniform refinements with exact boundary adaption
  • visualization on level 6: 30,720 cells, 31,713 vertices, 155,584 d.o.f.`s
  • computational mesh on level 7: 122,880 cells, 124,865 vertices, 618,368 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= 0.033333334 (= 1 frame)
  • Total time T= 10 seconds corresponds to 2,700 time steps
  • fractional step theta scheme




Computer requirements

  • date: 03/17/99
  • simulation by: J.F.Acker/S.Turek
  • visualization by: J.F.Acker
  • SUN ULTRA1/140MHZ 105 MB, 69,406 seconds
  • GMV data: 1.4 GB
  • 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