Mehrabi, MehdiNoori Rahim Abadi, Seyyed Mohammad AliMeyer, Josua P.2020-05-202020-05-202020Mehrabi, M., Noori Rahim Abadi, S.M.A. & Meyer, J.P. 2020, 'Heat transfer and fluid flow optimization of titanium dioxide-water nanofluids in a turbulent flow regime', Heat Transfer Engineering, vol. 41, no. 1, pp. 36-49.0145-7632 (print)1521-0537 (online)10.1080/01457632.2018.1513623http://hdl.handle.net/2263/74661In this study, the convection heat transfer and pressure drop of titanium dioxide–water nanofluids were modeled by applying the fuzzy C-means adaptive neuro-fuzzy inference system approach for a completely developed turbulent flow based on experimentally obtained training and test datasets. Two models were proposed based on the effective parameters; one model was developed for the Nusselt number considering the effects of the Reynolds number, Prandtl number, nanofluid volume concentration and average nanoparticle diameter. Another model was suggested for the pressure drop of the nanofluid as a function of the Reynolds number, nanofluid volume concentration, and average nanoparticle diameter. The results of these two proposed models were compared with experimental data as well as the existing correlations in the literature. The validity of the proposed models was benchmarked by statistical criteria. Moreover, a modified non-dominated sorting genetic algorithm multiobjective optimization technique was applied to obtain the optimum design points, and the final result was shown in a Pareto front.en© 2020 Taylor & Francis Group, LLC. This is an electronic version of an article published in Heat Transfer Engineering, vol. 41, no. 1, pp. 36-49, 2020. doi : 10.1080/01457632.2018.1513623. Heat Transfer Engineering is available online at : http://www.tandfonline.comloi/uhte20.Heat transferFluid flow optimizationTitanium dioxide–water nanofluidsFuzzy C-means adaptive neuro-fuzzy inference system (FCM-ANFIS)Engineering, built environment and information technology articles SDG-07SDG-07: Affordable and clean energyEngineering, built environment and information technology articles SDG-09SDG-09: Industry, innovation and infrastructureEngineering, built environment and information technology articles SDG-13SDG-13: Climate actionEngineering, built environment and information technology articles SDG-04SDG-04: Quality educationPostprint Article