شماره ركورد كنفرانس :
5320
عنوان مقاله :
Effects of confined jet impingement on the thermal performance of a convergent heat sink
پديدآورندگان :
Mashhadi Keshtiban Mohsen Mohsen.mashhadik@modares.ac.ir 1 Faculty of Mechanical Engineering, Tarbiat Modares University , Zabetian Targhi Mohammad zabetian@modares.ac.ir 1 Faculty of Mechanical Engineering, Tarbiat Modares University , Heyhat Mohamad Mahdi mmheyhat@modares.ac.ir 1 Faculty of Mechanical Engineering, Tarbiat Modares University , Bigham Sajad sbigham@mtu.edu 4 Faculty of Mechanical Engineering, Michigan Technological University, Michigan, United States
كليدواژه :
micro , channel , heat sink , jet impingement , heat transfer , fluid flow
عنوان كنفرانس :
سومين كنفرانس ملي ميكرونانوفناوري
چكيده فارسي :
Employing electro-cooling heat sinks has been growing in the last years, and numerous research has been done to enhance these heat sinks. Jet impingement in the heat sink significantly increases the heat transfer mechanism, and its improvement on the local heat transfer coefficient at the center of the jet is notable. Turbulent jet increases heat transfer by eliminating hydraulic and thermal boundary layers and leads to higher heat dissipation. The effect of the convergent heat sink with the combination of the jet has not been investigated, and this research tries to understand its effect on heat sink performance. k-ε Realizable turbulence model is used for simulations which is used in several articles. It was found that the convergent heat sink has better performance. The heat transfer coefficient decreased in the convergent heat sink slightly, while the pressure drops enhanced notably. For Re=15000, the heat transfer coefficient is decreased by 10%, and the pressure drop is enhanced by 33% for the convergent channel. By reporting heat transfer coefficient and pressure drop, it is shown that for reaching the same heat transfer coefficient, the convergent heat sink exposes smaller pressure drops in the system and shows better performance.
