Mixed convection fluid flow and heat transfer of Al2O3-water nanofluid with variable properties in a cavity with an inside Quadrilaterals obstacle, Mohammad Hemmat Esfe, Mohammad Akbari, Amir Hossein Refahi, Mohammad javad Noroozi, Abdolali Haghiri, Seyed Sadegh Mirtalebi Esforjani, Heat Transfer Research, 46(5), 465–482 (2015).