Alumina 1 Aluminum oxide 1 Containers 1 Convection flow 1 Cubic wavy container 1 Cylinders (shapes) 1 Entropy 1 Entropy generation 1 Finite element method 1 Heat convection 1 Heat sources 1 Inner cylinder Nanofluid flow 1 Nanofluidics 1 Nanofluids 1 Nusselt number 1 Solid cylinders 1 Solid inner cylinder 1 Steady convection 1 cubic wavy container 1 entropy generation 1 finite element method 1 heat source 1 heat transfer 1 solid inner cylinder 1