Date of Award


Publication Type

Master Thesis

Degree Name



Mechanical, Automotive, and Materials Engineering

First Advisor

Fartaj, Amir (Mechanical, Automotive, and Materials Engineering)


Mechanical engineering.




Mini and micro-scale channels have drawn researchers' attention in the past three decades. The use of these channels in a heat exchanger is due to the several advantages they provide. Motor oil was chosen as the working fluid since it is greatly utilized in automotive applications. In current investigations, experiments were performed to verify the aptness of cooling the oil through a cross-flow minichannel heat exchanger. The inlet temperature of the motor oil was kept constant at 75oC, while the air inlet temperatures were varied within the range of 20oC - 40oC. The range of oil Reynolds number was found to be between 0.85 to 3.5 whereas the air velocities were between 6 m/s and 18 m/s. Correlations were developed between the Nuoil and Reoil and Proil. The effect of Reoil on the heat transfer coefficient, NTU, and effectiveness were investigated. The results were compared with the findings of another viscous fluid where a similar test specimen was used and same trends were observed.