Dirichlet conditions Dispersion

Boundary conditions t >0) The standard conditions for axi-symmetric flow in a 2D tube can be specified in the following manner. There is no flow through the reactor wall. The normal velocity component is set to zero at the symmetry boundary. Plug flow is assumed at the inlet. A prescribed pressure is specified at the reactor outlet. For the scalar variables Dirichlet boundary conditions are used at the inlet, whereas Neumann conditions are used at the other boundaries, as for the 2D dispersion model simulations. 

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