Reply to: Discussion on "performance analysis of wells turbine blades using the entropy generation minimization method" by Shehata, A. S., Saqr, K. M., Xiao, Q., Shahadeh, M. F. and Day, A

With great interest, the authors have read the comments made by Ghisu et al. on our recent paper [1 published in Renewable Energy. The comments severely criticizes our methodology and results, which actually provide us with fortunate opportunity to discuss our work in more details to complement our work, thankfully to this available space of scientific discourse provided by Renewable Energy editors. In this reply, we show clearly that all the comments proposed by Ghisu et al. lacks sufficient understanding of Wells turbine modeling approaches, literature, and state of the art research practices. We also show that Ghisu et al. could not distinguish between fully developed turbulent flow and transitional flow around Wells turbine airfoils. It is also evidently shown that their concerns about the entropy generation calculation method are meaningless in the light of well-established practices of CFD models of entropy generation minimization principles. Our reply is structured in a point-by-point style to address the comments raised in the discussion article and help the readers understand our work in better details. (C) 2017 Published by Elsevier Ltd.