Neumann Values 

Compute the cooling effect of a duct with a cooling liquid in an axisymmetric cross section of a pipe.

Neumann values prescribe the flux over the boundary edge.

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Visualize the simulation region.

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Specify Dirichlet boundary conditions to set temperatures inside the pipe and outside.

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Specify a flux into the cooling duct in the pipe.

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Solve the Laplace equation.

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Plot the solution.

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