Computational Details:

Study of Delta Wing in Square Domain


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




Description of the flow problem

  •  Square domain of length 30
  • one Wing in form of traingle and located at x =0 , y = 0
  • inflow b.c.'s: constant velocity 1 at the left bottom edge i.e in between x=-10, y=-7.5 and x=10, y=7.7
  • outflow b.c's: unknown at the right top edge i.e. in between x=20, y=-7.5 and x=20, y=7.7
  • Other b.c.'s: zero velocity at the fixed walls
  • initial condition at t=0: starting from rest
  • viscosity parameter: 1/nu=1,0000



Description of the spatial discretization

  • coarse mesh (=level 1): 84 cells, 102 vertices,456 d.o.f.`s



  • uniform refinements with exact boundary adaption
  • visualization on level 4: 5376 cells, 5520 vertices, 27168 d.o.f.`s
  • computational mesh on level 4: 5376 cells, 5520 vertices, 27168 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=0.01
  • equidistant time stepping for visualization with k=0.25 (= 1 frame)
  • Total time T=30 corresponds to 3,000 time steps
  • fractional step theta scheme




Computer requirements

  • date: 03/30/2004
  • simulation by: Kandregula Srinivasa Rao
  • visualization by: Kandregula Srinivasa Rao
  • SUN ULTRA1/140: 2.83 MB, 1,619 seconds
  • GMV data: 99.3 MB
  • Software: FEATFLOW1.2 + 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