Back to Start Page Introduction Motivation Contents Current State Outlook New Videos Featflow Home Page Contact



Computational Details:

"Flow around a wing construction at medium Reynolds number (22.5 degree angle of attack)" Back to >>Flow around a wing construction at medium Reynolds number (22.5 degree angle of attack)<<


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




Description of the flow problem

  • diameter of circle: 10
  • length/height of (main) wing : 2.2/0.4
  • inflow b.c.'s: normalized Dirichlet data (size 1) depending on the angle of attack.
  • other b.c.'s: zero velocity at surface
  • initial condition at t=0: starting from rest
  • viscosity parameter: 1/nu=10,000




Description of the spatial discretization

  • coarse mesh (=level 1): 411 cells, 448 vertices, 2,131 d.o.f.'s



  • uniform refinements with exact boundary adaption
  • visualization on level 4: 26,304 cells, 26,607 vertices, 132,128 d.o.f.`s
  • computational mesh on level 5: 105,216 cells, 105,823 vertices, 527,296 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=0.006666667
  • equidistant time stepping for visualization with k= 0.1 (= 1 frame)
  • Total time T=30 seconds corresponds to 4,500 time steps
  • fractional step theta scheme




Computer requirements

  • date: 01/20/98
  • simulation by: S.Turek
  • visualization by: L.Seioukova
  • SUN ULTRA 45/250: 90 MB, 94,165 seconds
  • AVS data: 1,297 MB
  • Software: FEATFLOW1.0 + 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