[Nek5000-users] Flow past a sphere

[nek5000-users at lists.mcs.anl.gov]

Hello,

I have some problems with the PRENEK tool. I would like to simulate the 
flow past a sphere with NEK5000. But I have some problems to set up 
this case with PRENEK. When I defined a straight open-channel with some 
element (lets say Nx * Ny * Nz = 2 * 2 * 4, whereas x is the 
transverse, y the vertical and z the flow direction). To put a sphere 
into the channel, I'm using the CURVE SIDES > SPHERICAL MESH tool. I'm 
typing the following
  w        (whole sphere)
  0 1 2    (coordinates of sphere center)  ("center of the channel")
  n        (no prolate spheroid)
  s        (spherical shell)
  0.5      (radius)
  c        (extend to cartesian box)
  1.0      (minimal distance to box)

Then I'm defining the elements of the sphere as "Wall", but I also have 
to define all the sides of the cartesian box... And how should I do 
this, because this box just should be a part of the channel...

Thanking you in anticipation..


Best regards,
Fred