How to set a grid system of my own

ztdep · August 12, 2005, 08:10

i have use the example grid for compuation.

but i want to compute a problem of my own,
need i to write the whole dictionaly by hand?

regards

hsieh · August 12, 2005, 12:07

HI, ztdep,

You have to modify blockMeshDict to build your gemoetry and mesh it. Or, you can use netgen to generate Tet mesh of your model (it reads stl/step/igs files).

pei

ztdep · August 13, 2005, 00:13

but i was a very complex gemoetry ,

it was a heat exchanger.

what should i do .

alberto · August 13, 2005, 00:25

Hello ztdep,
you can generate the grid in a CAD/Mesh genearation tool. You can convert from the formats reported here: http://www.opencfd.co.uk/openfoam/do...l#x15-920003.6

Regards,
Alberto

ztdep · August 15, 2005, 01:54

i use the gridgen to generate my grid system,

what should i do next step!

regards!

hsieh · August 15, 2005, 12:02

HI, ztdep,

Save the mesh/BCs to Fluent/CFX/Star-CD format. Then use OpenFOAM conversion utility (check user manual) to convert it to OpenFOAM format. then, you can run the solver.

pei

ztdep · August 16, 2005, 22:55

is it nessaray to save the BC for Fluent,

regards

alberto · August 16, 2005, 23:21

Yes, in GAMBIT, set the boundary conditions.
However, when imported in OpenFOAM, you'll have to set them again. The converter keeps the BC's names, but not their type.

Regards,
Alberto

August 12, 2005, 08:10	i have use the example grid fo	#1
ztdep Senior Member p ding Join Date: Mar 2009 Posts: 427 Rep Power: 19	i have use the example grid for compuation. but i want to compute a problem of my own, need i to write the whole dictionaly by hand? regards

August 12, 2005, 12:07	HI, ztdep, You have to modi	#2
hsieh Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 317 Rep Power: 18	HI, ztdep, You have to modify blockMeshDict to build your gemoetry and mesh it. Or, you can use netgen to generate Tet mesh of your model (it reads stl/step/igs files). pei

August 13, 2005, 00:13	but i was a very complex gemoe	#3
ztdep Senior Member p ding Join Date: Mar 2009 Posts: 427 Rep Power: 19	but i was a very complex gemoetry , it was a heat exchanger. what should i do .

August 13, 2005, 00:25	Hello ztdep, you can generate	#4
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 36	Hello ztdep, you can generate the grid in a CAD/Mesh genearation tool. You can convert from the formats reported here: http://www.opencfd.co.uk/openfoam/do...l#x15-920003.6 Regards, Alberto __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

August 15, 2005, 01:54	i use the gridgen to generate	#5
ztdep Senior Member p ding Join Date: Mar 2009 Posts: 427 Rep Power: 19	i use the gridgen to generate my grid system, what should i do next step! regards!

August 15, 2005, 12:02	HI, ztdep, Save the mesh/BC	#6
hsieh Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 317 Rep Power: 18	HI, ztdep, Save the mesh/BCs to Fluent/CFX/Star-CD format. Then use OpenFOAM conversion utility (check user manual) to convert it to OpenFOAM format. then, you can run the solver. pei

August 16, 2005, 22:55	is it nessaray to save the BC	#7
ztdep Senior Member p ding Join Date: Mar 2009 Posts: 427 Rep Power: 19	is it nessaray to save the BC for Fluent, regards

August 16, 2005, 23:21	Yes, in GAMBIT, set the bounda	#8
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 36	Yes, in GAMBIT, set the boundary conditions. However, when imported in OpenFOAM, you'll have to set them again. The converter keeps the BC's names, but not their type. Regards, Alberto __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

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