Figure 4

Nusselt number responses as a result of \({\text{R}}\) increasing at fixed \({\text{We}} = 0.{7},{\text{ M = }}0.{8},\chi_{{\text{Fe}_{3} {\text{O}}_{4} }} = 0.1,\,\chi_{{\text{Al}_{2} {\text{O}}_{3} }} = 0.05\).

Nusselt number responses as a result of \({\text{R}}\) increasing at fixed \({\text{We}} = 0.{7},{\text{ M = }}0.{8},\chi_{{\text{Fe}_{3} {\text{O}}_{4} }} = 0.1,\,\chi_{{\text{Al}_{2} {\text{O}}_{3} }} = 0.05\).