the diffusion-​convection​-reaction equation " DISCONTINUOUS GALERKIN FINITE ELEMENTS " using DGFEM

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回答： Image Analyst 2020-12-26
Hello. I'm tryin to solve a problem : using discontinuous Galerkin finite elements method (DGFEM) for solving steady-state diffusion-onvection-reaction equations. the main programme in some research paper begins with
clear all
clc
% Generate the mesh
% Nodes
Nodes = [ 0 , 0 ; 0.5 , 0 ; 1 , 0 ; 0 , 0.5 ; 0.5 , 0.5 ; 1 , 0.5 ; 0 , 1 ; 0.5 , 1 ; 1 , 1 ] ;
% El ement s
Elements = [ 4 , 1 , 5 ; 1 , 2 , 5 ; 5 , 2 , 6 ; 2 , 3 , 6 ; 7 , 4 , 8 ; 4 , 5 , 8 ; 8 , 5 , 9 ; 5 , 6 , 9 ] ;
% Dirichlet bdryedge s
Dirichlet = [ 1 , 2 ; 2 , 3 ; 1 , 4 ; 3 , 6 ; 4 , 7 ; 6 , 9 ; 7 , 8 ; 8 , 9 ] ;
% Neumann bdryedge s
Neumann = [ ];
% Initial mesh struct
mesh=getmesh(Nodes,Elements,Dirichlet,Neumann,4,5) ;
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MATLAB shows us :
??? Undefined function or method 'getmesh' for input arguments of type 'double'.
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The problem is, we have do not have the code of getmesh function.

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回答（1 个）

Image Analyst
Image Analyst 2020-12-26
I'd contact the authors of that paper and ask them for their getmesh() function. They might give it or sell it to you, or maybe they'll tell you it's in some MATLAB toolbox that it's in, in which case you can buy that toolbox.

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