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-   -   CFD simulation of the wind over a terrain (http://www.cfd-online.com/Forums/openfoam-solving/92659-cfd-simulation-wind-over-terrain.html)

samiam1000 September 21, 2011 03:14

CFD simulation of the wind over a terrain
 
Dear all,

I have to perform the simulation of the wind over the terrain of a certain area. I start from a DTED map.

I would like to know which are the steps I have to do in order to get some good results.

Also, the software I wish to use is OpenFOAM.

Thanks a lot,

Samuele

cfd_newbie September 22, 2011 07:50

Do a google search for "bolund experiment" you might get some useful links and hints.

samiam1000 September 22, 2011 07:54

Never hared about it.

Let's try. Thanks a lot.

Samuele

elvis September 22, 2011 10:39

Hi,

have a look at http://www.cfd-online.com/Forums/ope...-openfoam.html
http://www.cfd-online.com/Forums/ope...tml#post260727

there was also s.th at http://openfoamwiki.net but I do not have the link

the post http://www.cfd-online.com/Forums/ope...tml#post256941 is very useful Terrain digital elevation maps (DEMs) => .Obj => STL from STL together with a suiting Blockmesh you can snappyhexmesh you terrain

elvis September 22, 2011 10:39

:Hi,

maybe this is of interest :p ?
http://openfoamwiki.net/index.php/Main_ContribExamples
http://openfoamwiki.net/index.php/Ma...ngInCityBlocks
http://openfoamwiki.net/index.php/Ma...banAreaNiigata
http://openfoamwiki.net/index.php/Ma...eBuildingModel http://www.aij.or.jp/jpn/publish/cfdguide/index_e.htm
http://www.ofwikija.org/index.php/Hi...ngInCityBlocks

samiam1000 September 22, 2011 11:24

Hi Elvis,

thanks a lot.

I will study the links you sent, tonight.

Then I'll let you know.

Keep in touch,

Samuele.

samiam1000 September 24, 2011 07:09

Hey Elvis,

one more question: could you explain how I can pass from the Terrain digital elevation maps (DEMs) to .Obj and then to STL?

I am working hard on the "turbineSitting" tutorial.. And I hope to cope with it as soon as possible!

Samuele

elvis September 26, 2011 08:24

Hi Samuele,

I do not know how Terrain digital elevation maps (DEMs) are converted to .Obj-files!

But .Obj ->.STL can be converted via any VTK-based Software (for example paraview http://paraview.org or Mayavi (1 or 2)
http://www.vtk.org/doc/release/5.8/html/a01304.html =>vtkOBJReader
http://www.vtk.org/doc/release/5.8/html/a01973.html =>vtkSTLWriter
http://www.vtk.org/doc/release/5.8/html/a00523.html => vtkDEMReader

well it looks like that you can read DEMso you also can write via vtkSTLWriter all within VTK

or MeshLab http://meshlab.sourceforge.net/

The Bolund experiment => http://web.student.chalmers.se/group...SlidesOFW5.pdf


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