It is appreciated much if you can suggest some grid generation code (commercial) that is simple to use and also provides accepted quality?

H

ICEM HEXA, no doubt

There is no single grid generation package that gives best results for all geometries under all starting conditions (meaning are you starting from CAD files, iges files, no CAD, etc.). Just like CFD packages, they each have strengths and weaknesses and you need the one that works best on the problem you are trying to solve. Without knowing what you are modelling or what type of data you start with, nobody can give you a meaningful answer.

Certainly agreed. There are big differences in philosophy and approach between the various grid generators. For example, some are mostly aimed at unstructured meshes and some more at structured. Some are better at importing CAD geometry, some are better at creating and manipulating their own.

When it comes to multi-block structured grid generation, I think CFD-GEOM (from CFDRC) is very good. Being aimed at CFDRC's own solvers, it doesn't export to anywhere near the number of formats supported by ICEM-CFD. It is much easier to use and get started with than ICEM, in my experience.

Unstructured grid generation is a different animal altogether. ICEM seems to be a popular choice and less temperamental than most! YMMV

as described on the above replies it heavily depends what you model and which solver you use.

as an additional note if you want to model a very complex geometry a cartesian mesher such as harpoon, cart3d, viscart may help you well.

regards,

GRIDGEN is also good. the more i use it the more i like it. plus they have free training for all costumers once every 3 months i guess . also their support group is very helpful. amol

Thanks for the info. of you all. I am looking for some structured-grid generators. Zonal methods (mutlti-block method) will be used as needed

Any concrete suggestions?

H

I'm using Gridpro ( www.gridpro.com ) for that purpose, which gives a much better grid quality and more flexibility than Icem Hexa.

gridgen does it

I don't think Gridgen is able to create the O grid structured mesh very easily. It can certainly do the job but will take a lots of time to do that...The good thing is Gridgen is quite flexible. If you can't get a high quality mesh, you can try it on Gridgen. ICEM Hexa does have the automatic O block function, which make the grid generation much easier in that sense.

Gridgen only provides free training for US client. Those outside the US will not be able to take this advantage, I think.... Their email support is not bad anyway.

Thanks for that info. and ya i just forgot the thing with US client. i think if you use poles then O grid can be done easily but again i dont have any experience with ICEM Hexa and so cannot really comment on this. -amol