temperature fluctuation decrease in pipe flow

[trentar]

Hay
does there exist some prediction about temperature fluctuation in pipe flow for radial direction and turbulent profile. I would like to decrease temperature fluctuation with some additional online heater. Any input is welcomed.
thanks

 

[BigInch]

Of course.

Try Google and insulation!

https://www.google.co.uk/?gfe_rd=cr&ei=smX5VPSNCILG4wbmpYHYDA&gws_rd=ssl#q=radial+pipe+heat+flow