Abstract

In this letter, we submit our comment on the following recently published papers by Kalidas Das: (1) “Influence of chemical reaction and viscous dissipation on MHD mixed convection flow,” Journal of Mechanical Science and Technology 28 (5) (2014) 1881-1885; and (2) “Cu-water nanofluid flow and heat transfer over a shrinking sheet,” Journal of Mechanical Science and Technology 28 (12) (2014) 5089-5094. The authors attempt to present the similarity solutions in both papers. We comment that the similarity transformations considered in Refs. [1, 2] are incorrect. Thus, the results presented by Kalidas Das lead to invalid conclusions.

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