Response to "Comment on 'Primary instability mechanisms on the magnetohydrodynamic boundary layer flow over a rotating disk subject to a uniform radial flow'" [Phys. Fluids 22, 029102 (2010)]

It was pointed out by Thess ["Comment on 'Oblique axisymmetric stagnation flows in magnetohydrodynamics [Phys. Fluids 19, 114106 (2007)]','' Phys. Fluids 20, 069102 (2008)] by Amaouche that the model used in the paper "Primary instability mechanisms on the magnetohydrodynamic boundary layer flow over a rotating disk subject to a uniform radial flow" by Turkyilmazoglu [Phys. Fluids 21, 074103 (2009)] is incomplete since the electric potential was neglected. This point is clarified here, and the ambiguity present in the magnetohydrodynamic flow research of this kind among the fluid dynamic community is remedied. As a consequence, the qualitative validity of the results in the work of Turkyilmazoglu ["Primary instability mechanisms on the magnetohydrodynamic boundary layer flow over a rotating disk subject to a uniform radial flow," Phys. Fluids 21, 074103 (2009)] from both the physical and mathematical viewpoints is justified. c 2010 American Institute of Physics. [doi: 10.1063/1.3319823]