[Nickul]

Has anyone any experience of MegaCADS ?

http://www.megacads.dlr.de/

I can see very little reference to it on this forum , or anywhere for that matter, I'd be interested to know whether anybody has got it running and therefore its worth my effort in installing a suitable OS.

I suppose getting to export something that Openfoam would understand would be the next challenge...

http://www.cfd-online.com/Forums/mai...-megacads.html

[aerospaceman]

Hi!

I'm also trying desperately to get this software to work.

I've emailed them, but I can't access the ftp address they provide.

Do you know how to go about it?

Any help would be great!

[Nickul]

Fill in the online form and they email you some usernames and passwords.

Just navigating to the ftp site does not enable you to download it, but if you use a client like Filezilla and enter a username and password you get access.

[FelixL]

Hi there,


I used MegaCADs whilst working on my bachelor thesis at the DLR. I was using it in conjunction with the DLR Tau-Code, thus I am not quite sure if it's easily possible to export the grids to a format which can be converted to OpenFOAM format.

MegaCADs is pretty good for generating block-structured meshes but the learning curve is very, very steep. I've written a small tutorial for this piece of software, but unfortunately it is entirely in german.

In a nutshell: if you're looking for a grid generation software for creating structured grids around more or less simple geometries and don't have problems with facing the troubles installing and using it, then go ahead, I strongly recommend it then.


If you have further questions feel free to ask.


Greetings,
Felix.

[SD@TUB]

Hello,

This presentation gave me an first insight into MegaCads:
http://www.vzlu.cz/download.php?file=235

I feel free to ask you Felix, if you could provide me the mentioned paper in my native language

/Stefan

[rnburne]

Is this software still available ? The website has no
link for downloading and the last post on this forum
regarding MegaCads indicated they do not answer
email. Looks interesting though.

http://www.megacads.dlr.de/


Ron

[NablaDyn]

Yes, it is still available. About one month ago I contacted the DLR MegaCads-Team via megacads@dlr.de and received a copy.
I'm running it on Ubuntu 14.04 64 bit.
Right now I'm working on a mesh conversion utility to convert MegaCads meshes into OpenFOAM PolyMesh-format.

regards

[rnburne]

That's good to know dhbw. Do you plan to make the
conversion utility available?

[NablaDyn]

If I get it right some day I will. Single-block works already though I'm still working on multi-block implementation. Did you get your MegaCads copy in the meanwhile?

[NablaDyn]

Originally Posted by dhbw

If I get it right some day I will. Single-block works already though I'm still working on multi-block implementation. Did you get your MegaCads copy in the meanwhile?

Guess I need to mention, the conversion utility is written in Scilab script language. So you will need to have that too. I bounded it to Scilab since I'm using MegaCads meshes in an own Scilab CFD code.

[NablaDyn]

Quote:
Originally Posted by dhbw
If I get it right some day I will. Single-block works already though I'm still working on multi-block implementation. Did you get your MegaCads copy in the meanwhile?

Guess I need to mention, the conversion utility is written in Scilab script language. So you will need to have that too. I bounded it to Scilab since I'm using MegaCads meshes in an own Scilab CFD code.

In the meanwhile I rewrote the tool in C++. Much quicker now and it also includes some fancy mesh-manipulation-schemes such as revolution or extrusion of 2D meshes.
Currently supported output formats are OpenFOAM BlockMeshDict (ASCII) and Tecplot (ASCII). Input has to be provided in MegaCads (FLOWer) format at this time.
I hope I can make it available soon and maybe it can help making MegaCads or "real" structured meshing a bit more popular (in terms of freely available OpenFOAM meshers).

[galogen]

Originally Posted by dhbw

I hope I can make it available soon

Hello dhbw! If you decide to make it available, could you post here the link? We'll be very grateful to you!

[NablaDyn]

Hello galogen,

actually, the current version is ready to publish and under heavy use in our research. Unfortunately, I'm still waiting for permission to make it officially available. But I'll put the link here asap.

[NablaDyn]

Well, here it is...
1. Extract
2. Place somewhere on your machine and define an alias
3. Execute by

$ bloomyboxx-alias <MegaCads mesh file>

The tool provides:
I. Mesh conversion: MegaCads to Tecplot, GMSH, OpenFOAM
II. Mesh manipulation: Cleaning, scaling, translation, extrusion, rotation, revolution, axisymmetric revolution, mirroring

It has a text based menu and thus should be self-descriptive. However, I will soon upload a paper describing it in detail.

Enjoy!

[NablaDyn]

If you want the paper, send me a private message.
Unfortunately the file is too large to upload.

[NablaDyn]

To test bloomyboxx and to get an impression of what MegaCads mesh data may look like, here is a sample grid.

For the use with bloomyboxx, simply use the '*.FLOWer' file.

For the use with MegaCads: Store the files somewhere, adapt the two paths in the 'SAVE_PROC_FILE_edit_before_use' properly and save as 'SAVE_PROC_FILE'. Now initialise MegaCads in the corresponding directory.

[NablaDyn]

I have been asked quite some times now about how to install MegaCads on Ubuntu. For those of you who do struggle to install MegaCads on Ubuntu, I wrote a step-by-step instruction:
http://www.cfd-online.com/Forums/ope...on-ubuntu.html
Hope it helps...

[NablaDyn]

I updated the BLoOMYBOXX utillity. It now offers direct OpenFOAM PolyMesh export with automatic patch generation (no more manual patching needed). Compared to the old BlockMeshDict approach, it is furthermore much, much faster. Even for large grids it now in general takes only seconds to fully convert the mesh.

Additional manipulation routines:

• Mesh-clone patterns (linear and circular)
• Block extracting/deleting
• Mesh appending
• Block boundary collapsing: This feature automatically lets you collapse/connect disjoint (by small gaps) block boundaries based on an absolute search radius for each boundary node. Very useful e.g. when trying to connect disjoint mesh regions that have been generated as circular clone pattern or to remove other small gaps.

Hope it's of use.

If you want the BLoOMYBOXX reference paper, send me a private message.

NOTE/EDIT: On Ubuntu 14 systems the native version of BLoOMYBOXXV1.5 seems to bail on start-up. So, if you are using an older system try the 'bloomyboxxV1.5Ubuntu14' version first. If you still encounter problems, please let me know.

[NablaDyn]

The latest version of BLoOMYBOXX (2.0) now fully supports batch processing for all implemented routines and some other useful extensions.

It's available via ResearchGate:

https://www.researchgate.net/publica...loomyboxx20tar

[Herjhoa]

Hello everyone:

I am just starting to use MegaCads and I am having the following problem. I have not been able to import my .popform file from my MegaCads GUI. I have followed the tutorial but it is not working as it is supposed to.

1) I locate my project directory <File/Projet/Open/I set my directory/ok>.

2) I Init the project <File/Init> (it is suppose to create 2 new files in my project directory --Init file and save file--, sometimes it works and sometimes it does not work). How can I make it work properly?

3) Import the file <File/Import/STL -Ascii (I was told to import my .popform file with that format> but no window is opened after I click over the STL -Ascii button thus, I have not been able to import my file. Any suggestion to do so?

Thank you