Effect of velocity ratio of impinging turbulent jets on heat transfer characterstics of heat sink, International Journal of Mechanical Engineering and Technology

A Thermal analysis on heat sink with cylindrical pin fins subjected to two turbulent impinging jets has been carried out by varying the fin base to tip diameter ratio (D/d = 1.0, 1.25, 1.66, 2.5 and 5.0) and also two jet velocity ratio (v1 / v2 = 1.0,
1.25, 1.66, 2.5 and 5.0) respectively for both in both inline and staggered arrangements by using Ansys Icepack with a constant heat input of 20W. The RNG k–ε model has been used to simulate the turbulent flow characteristics over the fins of heat
sink made of Aluminium. A comparison has been made in terms of heat transfer characteristics and pressure drop for both in-line and staggered arrangement of fins. It is observed that heat transfer co-efficient and thermal resistance increases with the
increase in velocity ratio and there is decrease in pressure drop through fins