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→2D Diffusion Advection Reaction example
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This is a short example on how to use <tt>bim</tt> to solve a 2D Diffusion Advection Reaction problem. | This is a short example on how to use <tt>bim</tt> to solve a 2D Diffusion Advection Reaction problem. | ||
The coplete code for this example can is on [[Agora]] [[http://agora.octave.org/snippet/1bqV|here]]. | The coplete code for this example can is on [[Agora]] at this link | ||
[[http://agora.octave.org/snippet/1bqV|here]]. | |||
We want to solve the equation | We want to solve the equation | ||
<math> -\mathrm{div}\ ( \varepsilon\ \nabla u(x, y) - \nabla \varphi(x,y)\ u(x, y) ) ) + u(x, y) = 1 \qquad \mbox{ in } \Omega</math> | <math> -\mathrm{div}\ ( \varepsilon\ \nabla u(x, y) - \nabla \varphi(x,y)\ u(x, y) ) ) + u(x, y) = 1 \qquad \mbox{ in } \Omega</math> | ||
<math> \varphi(x, y)\ =\ x + y </math> | <math> \varphi(x, y)\ =\ x + y </math> | ||