Overlapping Grid-Based Spectral Collocation Technique for Bioconvective Flow of MHD Williamson Nanofluid over a Radiative Circular Cylindrical Body with Activation Energy

Round 1

Reviewer 1 Report

Dear Author,

 We have no information on whether the model can handle transient scenarios. How can it predict the von Karman vortices at low Re?

Many equations include gravity, but the direction is unknown.

My main point is that the applicability of this information is low. Because the limits of the boundaries are not known.

Please add limits to the applied parameters and, based on that make a more quantitative prediction.

Finally, the use of this particular fluid should also be made and measured, simple theoretical conclusions may not be valid due to its unknown nature.

I request you add the parameters to a range that you think is valid.

Those that are theoretical (not measurable parameters, state its magnitude or range)

Author Response

Attached 

Author Response File: Author Response.pdf

Reviewer 2 Report

It is an exciting piece of work, and my overall recommendation is to publish the paper. However, some points improve the paper:

1.     Add the nomenclature

2.     For the current investigation, physically explain each term on the right hand of Eq. 2-5. Especially, the term relating to the high porosity that needed to be emphasized in the momentum equation.

3.     Physical explain the meaning of imposed boundary conditions.

4.     Which model is used for porous medium in this study? Mention the pore size of the porous material in this study.

5.     The author mentioned the base fluid is Williamson type. What about the nanoparticles?

6.     Explanation with physical interpretations of all tables should be addressed.

7.     Convergence of the method can be elaborated

8.     What is spectral accuracy?  see line 246.

9.     What do mean by overlapping grids?

10.  Why the time domain is divided into non-overlapping sun intervals?

11.  Add more details about the scheme in the appendix. It will help the fresh researcher to understand the applied numerical scheme.  

Author Response

Attached 

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Dear Authors,

The requested modifications were implemented.