[Gmsh] Dimensions in Gmsh & 3th parties software ...

[Cris G]

Thank you very much Felipe for the very fast and precise answer.

For the record: I have checked the "Overall domain bounding box" line after
running the checkMesh application and I realized that the coordinates are
of the order of thousands (thereby I have concluded that the channel height
H is indeed considered as 1186.84 m).

Hence, I will re-scale the coordinates by trying both solutions of the
given thread on CFD-online forum.

Cheers,
Cris


On Tue, Jun 11, 2013 at 2:11 PM, F. A. Portela <
felipe.alves.portela at gmail.com> wrote:

> Hi Cris,
>
> After using *gmshToFoam* your channel should have a height of 1186.84 m
> (since, as far as I know, Gmsh doesn't distinguish units); you can check
> this by running the *checkMesh* utility and looking at the "Overall
> domain bounding box" line.
>
> You can scale the whole mesh using the utility transformPoints<http://openfoamwiki.net/index.php/TransformPoints> with
> the "-scale" option. (there a thread on this topic here<http://www.cfd-online.com/Forums/openfoam-meshing-open/72332-gmsh-units.html>
> )
>
> I assume you should also be able to do this within Gmsh using the *Dilate*
>  transformation.
>
> Hope this helps.
>
> Cheers,
> Felipe
>
>
>
>
> --
> Felipe Alves Portela
> MSc student in Aerospace Eng. at TU Delft
> http://www.linkedin.com/in/felipealvesportela
>
>
> On 11 June 2013 13:58, Cris G <schroedinger.cat.is.not.here at gmail.com>wrote:
>
>> Hi everybody,
>>
>> the following might be a silly question, however I found it crucial for
>> my modeling.
>>
>> Background:
>> I have received a *.geo file which contains a channel whose height H is
>> 1186.84 (in the CAD file this height H is measured in mm).
>>
>> I will use OpenFOAM 2.1.1 in order to run my simulations, hence I will
>> make use of the "gmshToFoam" application to convert the Gmsh file (*.msh)
>> into an OpenFOAM mesh. In addition, I know that the natural units of
>> OpenFoam are the MKS system (meter, kilogram, second), thus this leads to
>> my question:
>>
>>
>> Question:
>> Once my OpenFOAM mesh is generated by "gmshToFoam", for OpenFoam the
>> height H of the channel will be 1186.84 meters or 1186.84 mm?
>>
>> Best regards,
>> Cris
>>
>> _______________________________________________
>> gmsh mailing list
>> gmsh at geuz.org
>> http://www.geuz.org/mailman/listinfo/gmsh
>>
>>
>
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