ABSTRACT
The chapter presents numerical analysis of the hybrid solution for cooling of high heat flux devices. The fluid flow configuration of a thermal device is made of nine microtubes with five inlet cross sections positioned tangentially to the flow channels. Consequently, the swirl flow is established inside the microthermal device, which increases the heat transfer coefficient. Moreover, a water-based Al2O3 nanofluid is used as the working medium in the laminar flow regime. Numerical simulations are performed with Ansys-Fluent commercial solver based on the finite volume approach. Besides, the fluid properties are considered temperature dependent with suitable equations for nanofluid properties. The analysis of the numerical results is based on fixed mass flow rate, Re, or pumping power basis. It is emphasized that conclusions are strongly dependent on the comparison criteria.
