The study of heat transfer and laminar flow of kerosene/multi-walled carbon nanotubes (MWCNTs) nanofluid in the microchannel heat sink with slip boundary condition

In this investigation, the laminar heat transfer of kerosene nanofluid/multi-walled carbon nanotubes in the microchannel heat sink is studied. The considered microchannel is two layers in which the length of bottom layer is truncated and is equal to the half of the length of bottom layer. The length of microchannel bottom layer is L = 3 mm, and the length of top layer is L-1 = 1.5 mm. The microchannel is made of silicon, and each layer of microchannel has the thickness of t = 12.5 mu m. Along the external bottom wall, the sinusoidal oscillating heat flux is applied. The top external and lateral walls are insulated, and they do not have heat transfer with the environment. The results of this research revealed that in different Reynolds numbers, applying oscillating heat flux significantly influences the profile figure of Nusselt number and this impressionability is obvious in Reynolds numbers of 10 and 100. Also, by increasing the slip velocity coefficient on the solid surfaces, the amount of minimum temperature reduces significantly which behavior remarkably entails the heat transfer enhancement.