Solving Boundary Conditions in 2D Axisymmetrical Model

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Giorgia
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Hi! I can't understand how to implement boundary conditions in a 2D axisymmetrical model. How should be the value of pressure, x-velocity and y-velocity at the axis of symmetry?

Thank you!
 
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You will have to give more details. You don't even mention which physical system you are talking about.
 

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