NDLI: Hydrodynamic and Thermal Characteristics of Single-Phase and Two-Phase Micro-Pin-Fin Heat Sinks

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Abel, M. Siu-Ho Qu, Weilin Pfefferkorn, Frank
Copyright Year	2007
Abstract	The pressure drop and heat transfer characteristics of single-phase and two-phase micro-pin-fin heat sinks were investigated experimentally. Fabricated from 110 copper, the heat sink contained an array of 1950 staggered square micro-pin-fins with 200×200 μm2 cross-section by 670 μm height. The ratios of longitudinal pitch and transverse pitch to pin-fin hydraulic diameter are equal to 2. Deionized water was employed as the cooling liquid. A coolant inlet temperature of 30 °C, and six maximum mass velocities, ranging from 183 to 420 kg/m2s, were tested. The corresponding inlet Reynolds number ranged from 45.9 to 105.9. General hydrodynamic and thermal characteristics of the two flow regimes of single-phase flow and flow boiling were described. The measured temperature distribution was used to evaluate single-phase heat transfer coefficient and Nusselt number. Predictions of the previous friction factor and heat transfer correlations that were developed for low Reynolds number (Re<1000) single-phase flow in short pin-fin arrays were compared to the present micro-pin-fin single-phase pressure drop and Nusselt number data, respectively. The Short et al friction factor correlation and the Kos¸ar et al. heat transfer correlation provided acceptable predictions.
Starting Page	1077
Ending Page	1087
Page Count	11
File Format	PDF
ISBN	0791843025
DOI	10.1115/IMECE2007-43888
e-ISBN	0791838129
Volume Number	Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B
Conference Proceedings	ASME 2007 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2007-11-11
Publisher Place	Seattle, Washington, USA
Access Restriction	Subscribed
Subject Keyword	Water Temperature distribution Temperature Cooling Reynolds number Fins Flow (dynamics) Boiling Friction Pressure drop Coolants Copper Heat sinks Heat transfer coefficients Heat transfer
Content Type	Text
Resource Type	Article

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