Diversified characteristic of carbon nanotube nanoparticles on the entropy minimization for the flow of hybrid nanofluid through a convectively heated surface

An analysis of entropy is essential to determine the heat transfer efficiency characteristics of nanofluids in different applications. Implementation of carbon nanotubes (CNTs) that is the combined effect of “single‐wall carbon nanotube” (SWCNT) and “multi‐wall carbon nanotube” (MWCNT) in water shows their effective properties in enhancing the heat transport phenomena. In general, these are useful in different industrial processes for the better shape of the product proposed as a coolant, cancer therapy, solar radiation, etc. Based on special characteristics, the current investigation analyses the flow properties of water‐based CNT cross‐hybrid nanofluid past a convectively heated surface. The heat transport characteristic enriches by the insertion of dissipative heat, thermal radiation, and external heat source/sink. The appropriate choice of similarity rules is useful in transforming the governing designed problem in non‐dimensional form and further, a “spectral quasi‐linearization method (SQLM)” is imposed to solve the set of equations. After getting the result, the process of irreversibility due to various factors is obtained, that is, the analysis of entropy is presented briefly. The physical significance of designed factors is deployed graphically and described in the discussion section. However, the validation with the earlier result is projected to show a good correlation.