Makinde, O.D. and Eegunjobi, A.S. 2021. Inherent Irreversibility of Mixed Convection within Concentric Pipes in a Porous Medium with Thermal Radiation. Journal of Mathematical and Fundamental Sciences. 53, 3 (Dec. 2021), 395-414. DOI:https://doi.org/10.5614/j.math.fund.sci.2021.53.3.5.