#Example_112 Defining a simple 2D BEM mesh fem #sets the environment to FEM fem define window fem draw axes #draws the axes. fem draw rule #draws a ruled grid. fem define nodes;r;bem_mesh;example #the nodes defined are the same as # ! in example_111. # !Click the centre mouse button to finish fem draw nodes #Draw the nodes fem define base;p #define a BE Lagrange/Hermite basis # ! function with one Xi direction fem define elements;m #define elements: pick pairs of nodes # ! 1,2; 2,3; 3,6; 6,5; 5,4; 4,1. # ! There are now six elements. Note # ! that the BEM elements are 1D and lie # ! around the edge of the mesh. Compare # ! this with the FEM mesh in example_111 # ! where the elements were 2D and # ! required 4 nodes to define them. fem list nodes #lists the number of nodes and their # ! coordinates. fem list bases #lists the defined bases. fem list elements #lists the elements (6). fem list node;bem_mesh #list the nodal coordinates to file # ! BEM_MESH.OPNODE in your local # ! directory.
Name Modified Size
example_112.com 10-Apr-2000 1.7k bem_mesh.ipbase 10-Apr-2000 855 bem_mesh.ipelem 10-Apr-2000 1.8k bem_mesh.ipnode 10-Apr-2000 1.3k
Name Modified Size
examples_1_11_112.tar.gz 18-Aug-2006 86k
Graphical output from this problem is given here.
Html last generated: Wed Mar 9 16:00:52 2016
Input last modified: Thu Apr 13 09:51:06 2000