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



Computational Details:

"Flow around the `TAAY' characters (A. Taylor) at medium Reynolds number" Back to >>Flow around the `TAAY' characters (A. Taylor) at medium 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

  • diameter of the circle: 2
  • rotational speed 1 (counterclockwise) on the circle (tangential speed)
  • other b.c.'s: zero velocity at the characters
  • initial condition at t=0: starting fully developed
  • viscosity parameter: 1/nu=1,000,000




Description of the spatial discretization

  • coarse mesh (=level 1): 54 cells, 78 vertices, 346 d.o.f.'s



  • uniform refinements with exact boundary adaption
  • visualization on level 5: 13,824 cells, 14,238 vertices, 69,952 d.o.f.`s
  • computational mesh on level 5: 55,296 cells, 56,126 vertices, 278,144 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=0.022222223
  • equidistant time stepping for visualization with k= 0.2 (= 1 frame)
  • Total time T= 50 seconds corresponds to 2,250 time steps
  • fractional step theta scheme




Computer requirements

  • date: 01/26/99
  • simulation by: A.Taylor/L.Rivkind/S.Turek
  • visualization by: L.Rivkind
  • SUN ULTRA1/140MHZ 47 MB, 42,311 seconds
  • GMV data: 510 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