Convective heat transfer correlation for external flow along a pipe

[WelshEngineer87]

Hi all,

I'm looking for an empirical correlation or calculation that can be used for assessing convective heat transfer along a pipe but on the external surface not the internal surface.

I know i can use the Gnielinski correlation for turbulent flow in an internal pipe. Is there an equivalent correlation for external flow longitudinally over a pipe?

 

[LittleInch]

Bare steel in air you're probably looking at something like an overall U value of 30-50 W/m2/degree C based on ID.

Lots of variables, a key one being external temp and wind speed.

If this is water then it could be 10 times that.

Lots of simulations available for this.

A one line question with no drawing or sketch is a little low on details so responses tend to be low on detail.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[goutam_freelance]

The flow and heat transfer is analogous to flat plate heat transfer. If natural convection effect can be neglected you can consider the pipe as flat plate with pipe opened up longitudinally. There are many flat plat heat transfer coefficient correlations available.

Engineers, think what we have done to the environment !

https://www.linkedin.com/in/goutam-das-59743b30/