| Summary: | Thermal enhancement and irreversible phenomena in colloidal suspension (Al<sub>2</sub>O<sub>3</sub>-H<sub>2</sub>O) is a potential topic of interest from the aspects of industrial, mechanical and thermal engineering; heat exchangers; coolant car radiators; and bio-medical, chemical and civil engineering. In the light of these applications, a colloidal analysis of Al<sub>2</sub>O<sub>3</sub>-H<sub>2</sub>O was made. Therefore, a colloidal model is considered and treated numerically. The significant influences of multiple parameters on thermal enhancement, entropy generation and Bejan parameter are examined. From the presented colloidal model, it is explored that Al<sub>2</sub>O<sub>3</sub>-H<sub>2</sub>O is better for the applications of mechanical and applied thermal engineering. Moreover, fraction factor tiny particles are significant parameters which enhanced the thermal capability of the Al<sub>2</sub>O<sub>3</sub>-H<sub>2</sub>O suspension.
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