regional_equations

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regional_equations

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{ REGIONAL_EQUATIONS.PDE

 This sample shows how to apply different equations in different regions.

 In this sample, the equations are essentially the same and the differing

 conductivities could be dealt with by regionally defined parameters, but

 this methodology can be used to apply different equations in the regions.

 FlexPDE will assume flux continuity at the material boundary.

 Care should be taken that this is correct for the application.

}

 

Title 'Regional Equations'

 

Variables Temp

 

Definitions

 A = 0

 B = 0

 kA = 1

 kB = 10

 eqnA = div(kA*grad(Temp))

 eqnB = div(kB*grad(Temp))

 

Equations

 Temp: A*eqnA + B*eqnB = 0

 

Boundaries

Region 'A'

   A = 1

  start(0,0) line to (1,0) to (1,1) to (0,1)

  value(Temp) = 100

  line to close

 

Region 'B'

   B = 1

  start(2,0) line to (1,0) to (1,1) to (2,1)

  value(Temp) = 0

  line to close

 

Plots

Contour(Temp) painted

 

End