If you want to use this to describe an experiment you should add more details regarding the setup you are using. E.g., peripherals, tubing changes in diameter and length, pumping system used (pump type and distance from the domain you want to model. Also, information regarding the measurements you can perform to help define the domain boundaries (e.g., flow speed, pressure drop at given locations and so on).

Hello Mehrdad;

You can enter the following boundary conditions:

At the inlet:

u= U∞=const, T= T∞=const and v=0.

At the tube surface and the walls of the test section:

No-slip boundary conditions (u=v=0) and T=T_tube.

At the outlet:

Outflow boundary conditions

** You can choose the parameter values according to the devices used in your experiment.

Best regards.

@patricio @Rawad Jamil Deeb

Thank you very much for your responses.

I'm not doing an experiment, I am just writing a Fortran code to simulate the flow over a cylinder using the stream-vorticity formulation. However, I'm not sure of how i can implement the right far-field boundary condition for the streamfunction and vorticity.

Thank you again for your time.

Mehrdad Ahmadinejad , you can take these values (from my experiments):

At the inlet:

u= 10 m/s, T= 48 C and v=0.

At the tube surface and the walls of the test section:

No-slip boundary conditions (u=v=0) and T=20,8 C.

At the outlet:

Outflow boundary conditions

@Rawad Jamil Deeb

Thank you man. But I still need to understand the right boundary condition for far away from the cylinder.

Mehrdad Ahmadinejad

This book will help you:

Heat Transfer In Turbulent Fluid Flows (Experimental and Applied Heat Transfer Equipment : A Series of Guide Books) "A Zukauskas"