The heat transfer coefficient (HTC) of microchannel sinks (MHS) is higher than common due to area volume ratio. Its value for two-phase flow boiling much superior single-phase flow. In addition, the provides uniform wall temperature close coolant’s saturation in low vapor qualities. present study, a sink optimized dimensionally after modeling R134a refrigerant microchannels. Firstly, mixture me...

In this paper, we analyze the values of entropic efficiency longitudinal fins by investigating coupling between function describing fin profile and corresponding steady-state temperature distribution along fin. By starting from different boundary conditions, look at maximizing From requesting that must comply with natural physical constraints, such as maximum thickness, obtain an optimal for a ...

To intensify heat transfer within the complex three-dimensional flow field found in technical devices, all relevant transport phenomena have to be taken into account. In this work, a generic procedure based on a detailed analysis of entropy generation is developed to improve heat sinks found in electric machines. It enables a simultaneous consideration of temperature and velocity distributions,...

This paper provides a comprehensive description of the thermal conditions within a heat sink with rectangular fins under conditions of cooling by laminar forced convection. The analysis, in which increasing complexity is progressively introduced, uses both classical heat transfer theory and a computational approach to model the increase in air temperature through the channels formed by adjacent...