[Yohan]

Hello everyone,


I am an undergraduate student, not familiar to OpenFOAM and global CFD field.


So I really need a help from you guys..


These days I am trying to analyze a water turbine inside the pipe.


Size of the turbine is about 0.4m, and inflow velocity is 6m/s.


Furthermore, turbine is rotating at 380RPM.



What I want to know is that, how can I set initial value of k and epsilon value and which boundary condition is necessary to the wall (pipe wall and turbine)?


I am using boundary conditions for k as
kqRWallFunction with $internalField
and epsilon as
epsilonWallFunction with $internalField.


Furthermore, for the initial value, I use turbulence calculator in this website and set turbulence intensity as 1%, Eddy viscosity ratio as 0.1


What I found was, the value of turbulence intensity is vary according to the situation, but I don't know which value is proper for this case.


If anyone has an idea about this case, please help me.!



Thanks in advance.