GPL hexahedral mesh tool httpwwwdiscretizerorg
 

Hello,
I've done a hexahedral mesh program. Source will be available soon. Please have a look at the screen shots: http://www.discretizer.org/node/9

Highlight:
-Geometry creation
-OpenFOAM mesh export
-OpenFOAM case setup. (only simpleFoam/air/k-e currently)

The code is close to an alpha state. But its possible to create/read geometrys and run it instantly (if you have OpenFoam installed of course).

Regards
Björn Bergqvist

http://www.discretizer.org

This looks very interesting. C
 

This looks very interesting. Could you tell us something more about the capabilities of discretizer? I.e. which formats can it read (gambit / fluent)?, and how complex may the geometries be?

Regards, Frank

I agree with Frank. Is geometr
 

I agree with Frank. Is geometry creation like gmsh?

Hi Björn, The program looks
 

Hi Björn,

The program looks quite interesting for constructing common cases. I'm looking forward to test driving it sometime in the future.

BTW: I like your choice of Ruby instead of Python. The syntax is clean and comfortable. But more importantly, the 'if' branches have a corresponding 'end' that really helps avoid common editting errors.

Which factors influenced your choice of Fox vs Qt (vs. wxwidgets)?

/mark

Since it's no commercial progr
 

Since it's no commercial program I've made some radical design decisions:
-No geometry import. The geometry is made in Discretizer and that's it.
-Written in Ruby. Much nicer syntax than Python. Possible to use by an engineer like myself.

This geometry building is important I think. If you make a geometry in Discretizer you will force your self to think about the mesh during the geometry building phase. And since it's not a CAD program it's easy to create planes in cylindrical and spherical coordinate system. A normal CAD user would be afraid of using cylindrical/spherical coordinate system.
If you build your model in a clever way it will give you a very nice (reusable) parametric model.
Now it is purely written in Ruby. In the future I will address performance problem by writing c extensions to Ruby. The conversion between coordinate systems would probably be the first c extension, since it's quite slow.

About the choice of Fox: The GLViewer example application written by Jeroen van der Zijp was a very nice starting point for me. Also it seems like Jeroen and Lyle Johnson (FXRuby) has the right attitude (LGPL no dual licensing).

Download: http://www.discretiz
 

Download: http://www.discretizer.org/node/2

Björn Bergqvist

Dear Björn Bergqvist, It wo
 

Dear Björn Bergqvist,

It would be nice if you could provide a typical step-by-step tutorial for discretizer. say a volume mesh over airfoil or some shape having radius, cone, cylinder etc.

Regards,
vinod

Hi, The discretizer looked
 

Hi,

The discretizer looked like a very interesting piece of code. Is it possible to build the geometry, then mesh it, then specify BCs, then finally export to OpenFOAM format?

pei

Hi, As for the geometry build
 

Hi,
As for the geometry building have a look at the screencast: http://www.discretizer.org/node/10
I will add more high level objects in future. Like create->cube with only a point as reference.

Pei-Ying: Yes, your right. Create Geometry, apply BC:s, export to OpenFOAM, run simpleFoam and start paraView. All could be done in the interface.

Look at the release as a preview. Don't expect too much right now. Still it's quite fun to do simple geometries and just test.

Björn

Hello I am trying to make a
 

Hello

I am trying to make a cylinder with a small cylinder inside.
Can discretizer create that geometry?

Furthermore, how can i install taht software on my pc?

Thank you in Advance
Armin

Hello Armin, I tried to do a
 

Hello Armin,
I tried to do a cylinder in a cylinder yesterday. Seems like it is possible but a bit complicated because I have not implemented higher level objects. Example of lacking functions:
-create cube between two faces.
-create face from 3 lines.

When you say pc: do you mean a pc with GNU/Linux operating system?

Regards
Björn

Hello Björn Appreciate abou
 

Hello Björn

Appreciate about the answer.
Yes.
Actually i work with OpenFoam and i work with GNU/Linux operating system.

I am trying to create a cylinder with another cylinder inside.

I had some difficulties to that as a new openFoam User.

your information about discretizershould be so useful for me.

Cheers
Amrin

Hi Bjoern, nice tool! I am
 

Hi Bjoern,

nice tool! I am wondering, if it is suitable for meshing the below diffuser (case 13.2):
http://130.83.243.201/ercoftac-sig15/workshop2008.html

The straight lines should be no problem, but what about the needed radii? Could this be a problem, when creating the geometry?

Thanks!
Fabian

Yes, it should be suitable for
 

Yes, it should be suitable for meshing the case 13.2 diffuser. Have a look at:
http://www.discretizer.org/files/euroftac_case1.dtz
and
http://www.discretizer.org/files/euroftac_case1b.dtz

Sorry for the slow response, I've been on vacation.

Regards
Björn Bergqvist

Hi Bjoern, thanks, though I
 

Hi Bjoern,

thanks, though I were not successful installing your tool on a new kubuntu, yet. I will try it again.

Fabian

I just installed discretizer w
 

I just installed discretizer with the following instructions on Hardy Heron 8.04 64-bit without any hassle:
http://www.discretizer.org/node/2

Regards
Björn Bergqvist

--- http://www.discretizer.org ---

Thanks, it works now! Looks in
 

Thanks, it works now! Looks interesting.
Fabian