Numerical analysis of self-driven temperature-sensitive magnetic fluid heat flow around two side-by-side heating cylinders under a solenoidal magnetic field

Abstract

A temperature-sensitive magnetic fluid (TSMF) is a functional fluid that enables heat transfer due to the temperature difference and magnetic field. Using this property, we can increase the driving force while promoting heat transfer by increasing the heat transfer area, in the same manner as a heat sink. However, when multiple cylinders are juxtaposed, the interference between the cylinders will greatly affect the heat transfer. In the present study, we used the hybrid lattice Boltzmann method to investigate the flow and heat transfer characteristics of a TSMF around two side-by-side heating circular cylinders under a solenoidal magnetic field. As the magnetic field increases, the heat transfer effect increases. Moreover, when the distance between the cylinders is close enough, the heat flow becomes unstable. Under the same magnetic field conditions, the unstable flow can promote heat transfer.