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Forum: OpenFOAM Running, Solving & CFD March 16, 2010, 12:47
Replies: 8
Views: 2,449
Posted By bjr
Turns out I didn't know about the Low Re version...

Turns out I didn't know about the Low Re version of the k-omega SST model. This was all failing at low Re and succeeding at high Re. There is a thread about the low Re version "out there".
Forum: OpenFOAM Running, Solving & CFD March 3, 2010, 20:20
Replies: 8
Views: 2,449
Posted By bjr
Fair enough... for academic investigations......

Fair enough... for academic investigations... but, I'm hoping to find an algorithmic tet or hex-mesher that is also capable of creating a boundary layer. I'm half tempted to write the boundary layer...
Forum: OpenFOAM Running, Solving & CFD March 2, 2010, 15:28
Replies: 8
Views: 2,449
Posted By bjr
files.me.com/ben.racine/ny44nk contains an...

files.me.com/ben.racine/ny44nk contains an updated case setup... again just issue "simpleFoam > log.simpleFoam"
Forum: OpenFOAM Running, Solving & CFD March 2, 2010, 14:45
Replies: 8
Views: 2,449
Posted By bjr
I think a relevant follow up question is... has...

I think a relevant follow up question is... has anyone had much success setting up low Re grids with snappyHexMesh... i.e. with adequate near-body boundary layer resolution?
Forum: OpenFOAM Running, Solving & CFD March 2, 2010, 04:41
Replies: 8
Views: 2,449
Posted By bjr
Hi Niels, 1. This can be corrected by...

Hi Niels,

1. This can be corrected by changing the line 43 of snappyHexMesh from

" max (4.0 0.7 2.5)"
to
" max (4.0 0.7 8.0)"

2. I've noticed that I am getting reasonable pressure...
Forum: OpenFOAM Running, Solving & CFD March 2, 2010, 02:24
Replies: 8
Views: 2,449
Posted By bjr
I've attached some images...

I seem to be getting good results when it is inertia/pressure dominated and rather terrible results when it's viscous dominated... probably due to my very poorly resolved boundary layer mesh?
Forum: OpenFOAM Running, Solving & CFD March 2, 2010, 01:16
Replies: 8
Views: 2,449
Posted By bjr
Matching cylinder drag

Hello all,

I am beginning to try to match the drag coefficients seen here:
http://scienceworld.wolfram.com/physics/CylinderDrag.html

My case setup for 1e5 Reynolds number can be downloaded...
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