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Lee, Jaeseon
Innovative Thermal Engineering Lab (ITEL)
Research Interests
  • Energy conversion utilizing renewable/recyclable thermal sources
  • Thermal management of electronics and high heat-flux devices
  • Working fluids characterizing for thermo-fluid physics and systems

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Experimental Investigation and Theoretical Model for Subcooled Flow Boiling Pressure Drop in Microchannel Heat Sinks

Cited 4 times inthomson ciCited 4 times inthomson ci
Title
Experimental Investigation and Theoretical Model for Subcooled Flow Boiling Pressure Drop in Microchannel Heat Sinks
Author
Lee, Jae SeonMudawar, Issam
Keywords
Axial variations; Bulk liquid; Energy control; Experimental investigations; Flow characteristic; Heated wall; Hydraulic diameter; Inlet temperature; Mass velocity; Mean absolute error; Micro channel heat sinks; Microchannel size; Model prediction; New model; Phase layers; Pressure drop characteristic; Saturation temperature; Subcooled flow; Subcooled flow boiling; Theoretical models; Thermodynamic equilibria
Issue Date
2009-09
Publisher
ASME-AMER SOC MECHANICAL ENG
Citation
JOURNAL OF ELECTRONIC PACKAGING, v.131, no.3, pp.0310081 - 03100811
Abstract
This study examines the pressure drop characteristics of subcooled two-phase microchannel heat sinks. A new model is proposed, which depicts the subcooled flow as consisting of a homogeneous two-phase flow layer near the heated walls of the microchannel and a second subcooled bulk liquid layer. This model is intended for conditions where subcooled flow boiling persists along the entire microchannel and the outlet fluid never reaches bulk saturation temperature. Mass, momentum, and energy control volume conservation equations are combined to predict flow characteristics for thermodynamic equilibrium qualities below zero. By incorporating a relation for apparent quality across the two-phase layer and a new criterion for bubble departure, this model enables the determination of axial variations in two-phase layer thickness and velocity as well as pressure drop. The model predictions are compared with HFE 7100 pressure drop data for four different microchannel sizes with hydraulic diameters of 176-416 μm, mass velocities of 670-5550 kg/m2 s, and inlet temperatures of 0°C and -30°C. The pressure drop database is predicted with a mean absolute error of 14.9%.
URI
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DOI
10.1115/1.3144146
ISSN
1043-7398
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