Numerical Investigation of the Impact of Heat Distribution on Fluid Flow for the Combination of Newtonian–Newtonianand Newtonian–Non‐Newtonian Fluid

ABSTRACT Microchannels are used for thermal exchange because of their precise volume and higher heat dissipation capacity due to its surface to volume ratio. The thermal performance of microfluidic systems is greatly influenced by the dynamics of Newtonian and non‐Newtonian fluid flows inside microchannels. In the current study, the regulation of temperature fluctuations within the working fluid is evaluated by executing the thermo‐fluid coupling effects in micro‐channels. For a combination of Newtonian–Newtonian and Newtonian–non‐Newtonian influx fluid, the impact of flowing fluid on heat distributions with regards to micro‐fins heat element sources within a microchannel was investigated numerically. Three micro‐fins shape, viz., rectangular, triangular, and circular fin structures were used in the study. Rectangular fins had the largest as well as lowest heat transfer to the fluid flow for the combination of Newtonian–Newtonian fluids. It is also evaluated that for rectangular fins, the maximum Nu value obtained was 18.42 and the minimum Nu value obtained was 1.04. In addition, for triangular fins, the maximum Nu value obtained was 16.16 and the minimum Nu value obtained was 1.13. Finally, for circular fins, the maximum Nu value obtained was 9.82 and the minimum Nu value obtained was 1.22.