One of the most challenging problems in modern Finite Element Analysis is automatic generation of quarilateral meshes in complex multiply-connected domains. 100% quadrilateral mesh generation by itself is a complex problem, and our mesh generation products QUAD-GEN, ANISO-QUAD and QUAD-BUILD possess that capability regardless of actual complexity of a domain's boundary.

Why three different products ?

This is because different areas of computational physics and engineering impose different requirements on specific properties of mesh generation software:

• In mechanical engineering applications (say, stress analysis of automotive or aircraft components) 2D FEA is usually applied to cross-sections of metal parts. Such cross-sections can have quite irregular shapes and, possibly, several internal openings ("holes"); the latter can also be complexly shaped. Due to sensitivity of stress fields obtained by FEA to the quality of finite element meshes, it is highly desirable that the mesh contains only "well-shaped" elements, i.e. close to rectangles with low aspect ratios. An example of such part, meshed by our principal software product QUAD-GEN is presented below.
• In Computational Fluid Dynamics models, a necessity arises to accurately represent layers of fluids with highly anisotropic properties. In terms of the mesh generation this means capability of the software to create layers of elements with large (preferably, user-defined) aspect ratios. Our product ANISO-QUAD is designed specifically for that purpose; please see the example below (a flow around an obstacle).

• In structural engineering and some other areas a necessity arises to generate rather dense meshes around certain points of the domain; for example, around a point where either a force is applied or a constraint is imposed. Another typical property of such domains can be presence of internal line segments that must be included into the mesh "as is", and no low-quality elements are allowed within its vicinity (please see example below). A special-purpose product: QUAD-BUILD mesh generator - was developed by us, with the purpose of processing that kind of geometries.

Please follow this link to find out more about the full range of our products and services.

Delivery, licensing and support.

QUAD-GEN, ANISO-QUAD and QUAD-BUILD were completely developed by our company and contain no third party code. They are available either in the complete source code form with full commercial license, or as standalone executables. If you purchase any one of our products, you will be provided with:

- complete, fully commented source code in ANSI C (in case of the the full commercial license);

- User Manual, containing detailed description of input and output data structures and an example driver program;

- a variety of representative examples;

- and a graphical visualisation program QUAD-PRO 2.0  that allows displaying initial geometries that are to be processed, as well as generated quadrilateral meshes.

Please contact us on the address below (or, preferably, by e-mail) . We can also help with other mesh generation and finite element analysis needs.

Computational Mechanics Australia Pty. Ltd.

PO Box 736

Camberwell South , VIC, 3124

AUSTRALIA

Ph.: + 61-3-9809-0814

Fax: + 61-3-9809-0843

Email: comecau@bigpond.com

WWW http://www.users.bigpond.com/comecau/

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