[chenqi]

hi, Everyone.
I want to define a velocity boundary condition, the value of the velocity is relative to the pressure at a certain point, such as (x0, y0, z0). The used type of boundary condition is codeFixedValue, but i do not know how to get the value of the pressure. I am very new in C++, Can you hlep me

[Jeneas]

I'm not sure to understand your problem but if u want to find the pressure in a point (x,y,z), you can use a probe.
(/etc/casDicts/postProcessing/probes)

[RobertHB]

Originally Posted by chenqi

hi, Everyone.
I want to define a velocity boundary condition, the value of the velocity is relative to the pressure at a certain point, such as (x0, y0, z0). The used type of boundary condition is codeFixedValue, but i do not know how to get the value of the pressure. I am very new in C++, Can you hlep me

A reference pressure can be set in the fvSolution Dict.

    pRefPoint            0;
    pRefValue            0;