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1D

2D

3D

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Boundary conditions

1gP= Prescribed pressure. When the pressure isspeciied as a known unction o position and time!irst kind or"irichlet boundary condition#

2g=nu Prescribed mass flux. When the total masslu$ is known on the boundary!second kind%

&on 'eumann condition#

(or an impervious boundary

!i.e.% a no-flow boundary condition#

02 =g

on

on

on

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Mixed boundary condition.* boundary condition o mi$ed kind !or third kind)

3ggpg up =+ nu

3,, ggg up *re given unctions

Robin or Danwerts boundary condition

on

!"e initial condition

)()0,( 0 xx pp = x