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Making SEOM grids with Cubit

Katherine S. Hedström
Institute of Marine and Coastal Sciences
Rutgers University

A postscript version of this document is available.

Cubit is a grid generation tool for building quadrilateral 2-D grids and hexahedral 3-D grids. It is available from Sandia National Labs, but is not freely available. Check their web page for more information. The other software described in this manual is not currently on the net but could be made available if there is demand for it.

This document describes the steps in building grids using Cubit. It is not meant to replace the manual, but to expand on the steps before and after Cubit itself is run, as shown in figure 1. The exact sequence of operations depends on whether the grid is an x,y grid or a latitude, longitude grid. In either case, the grid is created in a flat x,y coordinate system, although Cubit is capable of building spherical grids when given its input in a more sophisticated (CAD) file format. We use the more primitive vertex Cubit commands because they work and because we already have experience converting from x,y to latitude, longitude and back again.

  
Figure 1: Some SEOM grid programs. The green boxes refer to Perl scripts which call the other programs for you to save you from having to remember all the steps. The red cubit box is where the grid generation happens.
\begin{figure}
\setlength{\unitlength}{1 cm}
\centerline{
\begin{picture}
(12.5,18)
\epsfig{file=flow_small.eps,width=12.5cm}
\end{picture}}
\end{figure}



 
next up previous
Next: Box grid example
Kate Hedstrom
2001-05-09