Comment on “Investigation of heat transfer enhancement of Cu-water nanofluid by different configurations of double rotating cylinders in a vented cavity with different inlet and outlet ports” [International Communications in Heat and Mass Transfer, 126 (2021) 105432]

The following comments address a few missing information that resulted in inaccurate qualitative and quantitative findings in the aforementioned article. This analysis, therefore, serves as a comparison and correction to the publication “Investigation of heat transfer enhancement of Cu-water nanofluid by different configurations of double rotating cylinders in a vented cavity with different inlet and outlet ports” by H. Moayedi, Int. Comm. Heat Mass Transfer 126 (2021) 105432.