Discussion: “Simultaneous Effects of Nonlinear Mixed Convection and Radiative Flow Due to Riga-Plate With Double Stratification” (Hayat, T., Ullah, I., Alsaedi, A., Ahamad, B., 2018, ASME J. Heat Transfer, 140(10), p. 102008)

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Asterios Pantokratoras
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Double Stratification ◽  
Nonlinear Mixed Convection ◽  
Riga Plate

Abstract The present comment concerns some doubtful results included in the above paper.

Simultaneous Effects of Nonlinear Mixed Convection and Radiative Flow Due to Riga-Plate With Double Stratification

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Tasawar Hayat ◽  
Ikram Ullah ◽  
Ahmed Alsaedi ◽  
Bashir Ahamad
Keyword(s):  
Heat Transfer ◽  
Nonlinear System ◽  
Differential Equations ◽  
Mixed Convection ◽  
Heat Transfer Analysis ◽  
Convection Flow ◽  
Nonlinear Thermal Radiation ◽  
Double Stratification ◽  
Nonlinear Mixed Convection ◽  
Riga Plate

This paper addresses nonlinear mixed convection flow due to Riga plate with double stratification. Heat transfer analysis is reported for heat generation/absorption and nonlinear thermal radiation. Physical problem is mathematically modeled and nonlinear system of partial differential equations is achieved. Transformations are then utilized to obtain nonlinear system of ordinary differential equations. Homotopic technique is utilized for the solution procedure. Graphical descriptions for velocity, temperature, and concentration distributions are captured and argued for several set of physical variables. Features of skin friction and Nusselt and Sherwood numbers are also illustrated. Our computed results indicate that the attributes of radiation and temperature ratio variables enhance the temperature distribution. Moreover, the influence of buoyancy ratio and modified Hartmann number has revers effects on rate of heat transfer.

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