Computational Details:

"Ring-shaped flow (II) around `SFB' and `IWR' at high Reynolds number"

• diameter of the outer circle: 2
• diameter of the inner circle: 0.5
• rotational speed 1 on both circles in different directions (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

• coarse mesh (=level 1): 82 cells, 119 vertices, 496 d.o.f.'s
  

  
  
  

• uniform refinements with exact boundary adaption
• visualization on level 5: 20992 cells, 21674 vertices, 106336 d.o.f.`s
• computational mesh on level 7: 335872 cells, 338618 vertices, 1687608 d.o.f.`s
• nonconforming nonparametric rotated bilinear fem's (meanvalue version), UPW

• equidistant time stepping for computation with k=0.016666667
• equidistant time stepping for visualization with k= 0.2 (= 1 frame)
• Total time T= 50 seconds corresponds to 3000 time steps
• fractional step theta scheme

• date: 08/25/98
• simulation by: J.F.Acker,S.Turek
• visualization by: J.F.Acker
• SUN ULTRA1/170: 272 MB, 328775 seconds
• AVS data: 931 MB
• Software: FEATFLOW1.1 (BOUSS)

• 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!