Comments on “Significance of non-uniform heat generation/absorption in hydromagnetic flow of nanofluid due to stretching/shrinking disk”

Abstract The definitions of v r and v z components do not satisfy the mass conservation law. Also, K refers to the permeability in the momentum equation while K refers to the temperature in the energy equation. This is a strong confusion in the mathematical model. Substituting the ( ∂ Q n ∕ ∂ z ) expression into the energy equation, this term has a positive sign, which is impossible. This term must have a negative sign. Using the definition of heat capacities ratio ( τ ), τ = 1 . In addition, there is no congruity in the D k and D B units. Furthermore, the porosity parameter ( G ) and the radiation parameter ( N r ) are dimensional. Moreover, D k must be used instead of D m in calculating the thermophoretic parameter ( N t ). Further, chemical reaction parameter ( γ ) is dimensional. A suitable correct form of γ is given.