> Do any of you have access to "The finite element method" vol. 1 by > Zienkiewicz & Taylor? Pg. 222 is referenced as the source for orders > 1-5, > and I want to make sure that the 5th-order rule has only 15 points... >
The report by Walkington, "Quadrature on Simplices of Arbitrary Dimension" has a quadrature rule on tets that is exact for polynomials of degree 5, and has 15 points (i.e., see Table 2.1, but note that the 15th point is the w_0 point), but it looks like it's not the quadrature rule used in the code. The report is located here: http://www.math.cmu.edu/~nw0z/publications/00-CNA-023/023abs/ and it is cited in the libmesh source code for fifth order gauss quadrature on triangles. On a related note, I've been using the 4th order quadrature rule on tets with 11 quadrature points, does anyone know where that one came from? Cheers, Dave ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Libmesh-devel mailing list Libmesh-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-devel
