Welcome to ez4u

Ez4u is an "easy" mesh generator environment "for you", the final user. This project has been started at the Laboratori de Càlcul Numèric. Its goal is to simplify geometry modeling and mesh generation for academic computational simulations. Currently, Ez4u is under continous development. In this website you can download the latest version.

How to get it

Ez4u is free for you. We only ask you for sending us comments, bugs, or questions that you have after using it. You can contact with xevi.roca@ (add upc.edu). This is the real cost for you. Thank you for contributing to improve Ez4u.

- ez4u-installer.exe. Installer for windows machines of the ez4u environment.

Install

- Windows. For installing the software in a windows machine:

1. Download the ez4u-installer.exe file.
2. Uncompress the file in the selected installation folder.
3. Execute the ez4u.exe file.
4. Now you can work with the ez4u mesh generation environment.

LaCàN Lab

Now ez4u is available in the LaCàN Lab, room 210. In order to use the graphical mode:

1. Log with your account in one of the xwing machines.
2. Open a console (Konsole, xterm, ...)
3. Type in the command prompt: ez4u
4. Ez4u mesh generation environment is started.
5. Now, you can work with it.

Description of the Gen4u algorithm

EZ4U is a mesh generation environment that includes the Gen4u algorithm for quadrilateral mesh generation. The quadrilateral mesh generation algorithm consist of continuous splitting of the domain until quadrilateral elements of the prescribed size are obtained. The result is then checked and if necessary some nodal positions and connectivities are changed.

Recursive mesh generation

The domain is discretized choosing in every step the optimal splitting line. Every line splits the domain in two subdomains. For this reasons it is implemented by a recursive algorithm.

• Generación automática de malllas no estructuradas y formadas exclusivamente por cuadriláteros sobre superficies curvas en R3
  Sarrate, J. and Huerta, A.
  Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol. 18, Issue 1, pp. 79-93, 2002
• Efficient unstructured quadrilateral mesh generation
  Sarrate, J. and Huerta, A.
  International Journal for Numerical Methods in Engineering, Vol. 49, pp. 1327-1350, 2000

Smoothing method

A smoothing technique is used in order to improve the element quality.

• An improved Algorithm to Smooth Graded Quadrilateral Meshes Preserving the Prescribed Element Size
  Sarrate, J. and Huerta, A.
  Communications in Numerical Methods in Engineering, Vol. 17, pp. 89-99, 2001

Download

These are the pre-compiled versions available:

• gen4u-irix32staticgl.gz (1300 KB). Pre-compiled version for IRIX 6.x platform statically linked to MesaGL.
• gen4u-irix32x11.gz (133 KB). Pre-compiled version for IRIX 6.x platform without OpenGL extensions.
• gen4u-windows.zip (126 KB). Pre-compiled version for Windows 9x/NT platforms.

The spanish version of the manual is available in PDF form (161 KB) and in compressed PostScript form (160 KB).