Investigations on Heat Transfer Characteristics of Porous Type Copper Heat Sink With Bifurcations

Abstract

The lotus type porous copper heat sink has a higher heat transfer capacity as compared to micro channel heat sink for same size. Many studies on this heat sink show that its heat transfer capacity can be further improved by improving design of heat sink. This study investigates the heat transfer and flow characteristics of porous heat sink with different designs of internal bifurcations under both laminar & turbulent flow and studies the effect of such bifurcations on heat transfer of heat sink. The results of heat sink with bifurcations are compared with that of heat sink without bifurcations which show that for case of both laminar & turbulent flow, the heat sink with bifurcation showed better thermal performance as compared to heat sink without bifurcations.

An analysis of the impact of nanofluids on the cooling effectiveness of pin and perforated heat sinks

“…Different manufacturing techniques also play an important role in the design of heat sinks; for example, pin-type geometry with addi-tive manufacturing was designed and its effects analyzed [10]. Thangavel and Sekar [11] designed a lotus-type heat sink, analyzed the temperature distributions in laminar and turbulent flow, and observed that they decreased up to 302 K. Nanofluids (NFs) are being used more and more to improve heat transfer in different HS setups because to their high thermal conductivity and density. The computational study conducted by Kavitha et al [12] demonstrated a significant 68% enhancement in heat transfer for a fin-type HS by utilizing Al 2 O 3 /water nanofluid.…”

Possibilities of Using Low-Density C–C Composites for Thermal Protection of Small Unmanned Aerial Vehicles

“…It is also possible to use cooling agents. However, a significant specific gravity (8.6 g/cm 3 ) does not allow the use of such materials in products intended for flight [17].…”