[caoxuxiang]

Hello everyone
I recently encountered a problem, when i use star-ccm+ to calculate the flow around the airfoil at low Reynolds number , the fluid model should be set to laminar or turbulent flow?
Could you recommend a book on the analysis of the boundary layer;
Thank you very much!

[lcarasik]

Originally Posted by caoxuxiang

Hello everyone
I recently encountered a problem, when i use star-ccm+ to calculate the flow around the airfoil at low Reynolds number , the fluid model should be set to laminar or turbulent flow?
Could you recommend a book on the analysis of the boundary layer;
Thank you very much!

Assuming your Reynolds number is in the laminar regime of flow for your domain, you should simulate it as laminar flow.

Boundary Layer Theory by Hermann Schlichting is a good starting point.

[caoxuxiang]

Originally Posted by lcarasik

Assuming your Reynolds number is in the laminar regime of flow for your domain, you should simulate it as laminar flow.

Boundary Layer Theory by Hermann Schlichting is a good starting point.

Suppose I simulated hydrofoil performance, when the Reynolds number is very small (about several hundred), then whether the fluid domain model should be set for the turbulence?
Thank you very much for giving me the recommended textbooks.

[lcarasik]

Originally Posted by caoxuxiang

Suppose I simulated hydrofoil performance, when the Reynolds number is very small (about several hundred), then whether the fluid domain model should be set for the turbulence?
Thank you very much for giving me the recommended textbooks.

Is that a turbulent regime of flow for that specific geometry?

[caoxuxiang]

Do you mean the geometric model is in the turbulent region or that the general fluid is turbulent?
Bu that's where my confusion lies.

[me3840]

Originally Posted by caoxuxiang

Do you mean the geometric model is in the turbulent region or that the general fluid is turbulent?
Bu that's where my confusion lies.

Look up how to calculate the Reynolds number and see how that relates to the physics of the fluid..

https://en.wikipedia.org/wiki/Reynol...turbulent_flow