[Tarun BC]

Hi guys,

I'm facing a problem in fixing the boundary conditions to set up inlet angle for velocity. I'm using bouyantBousinesqiSimpleFoam as the solver.

I kindly request you to help me out on this.

Thank You

[yambanshee]

for a flow velocity of U and angle t, calculate: Ux = U*cos(t) and Uy = U*sin(t) and use those values in a fixedValue inlet velocity.

[Gang Wang]

Originally Posted by Tarun BC

Hi guys,

I'm facing a problem in fixing the boundary conditions to set up inlet angle for velocity. I'm using bouyantBousinesqiSimpleFoam as the solver.

I kindly request you to help me out on this.

Thank You

Hi!

Have you solved this problem? I also want to find a solution to define the inlet velocity direction with the inlet boundary. How to define it?

Best regards,
Gang Wang

[H.Tofighian]

You can use the line below to find the normal vector of any patch:

tmp<vectorField> n = patch().nf();

Be aware that the direction of this normal vector is outside the domain. So multiply it by the negative of magnitude of velocity in the updateCoeffs function of your new boundary condition.
If you don't like coding, use the flowRateInletVelocity Boundary condition.