Dear Saurabh,

I suggest you the following interesting paper

https://www.rose-hulman.edu/~richards/courses/me462/ME462_Spring_2007-2008/Wilson_plot_method.pdf

With my best regards

Prof. Bachir ACHOUR

Look at this website, Good luck

http://labman.phys.utk.edu/phys136/modules/m1/Viscous%20fluids.htm

Dear Saurabh Yadav,

yes, it can be used for any fluid. For reliable results the variation of the thermal conductivity of the fluid is recommended. With a gas you can make use of the temperature dependence of its thermal conductivity. I suggest to read the paper: Roetzel, W., Na Ranong, C.: On the Application of the Wilson Plot Technique. Heat and Technology 21, 2 (2003), 125-130.

Best regards

Wilfried Roetzel

Respected Wilfried Roetzel sir,

Thank you so much.

Dear Mr. Yadav,

the Wilson plot method can be used for any type of fluid. as Mr. Roetzel mentioned, you need to take into account the dependence of the air thermo-physical properties on temperature.

Good luck.

Kind regards,

Kifah SARRAF