Micro Channel Heat Sink

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Micro Channel Heat Sink
Microfluid Mechanics

• Chin Hoong Leong
• Project 1

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Agenda

• Introduction
• Single-Phase Micro-channel
• Two-Phase Micro-channel
• Operation Principles

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Existing Heat Sink
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Example of Application
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Micro-channel Heat Sink
Images of micro-channels. 40 by 100µm
single-channel and 40 parallel multi-channel
Schematic of the experimental apparatus for
characterization of the microchannel heat
exchanger.
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Micro-channel Heat Sink Current State
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Single-Phase Micro-channel Flow
A schematic of hydrodynamic and thermally
developing flow, followed by hydrodynamically and
thermally fully developed flow

• 0.01ltKnlt0.1 (Slip Flow Region)
• 50ltRelt850

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Two-Phase Micro-channel Flow
Wall and mean fluid temperature, flow patterns,
and the accompanying heat-transfer ranges in a
typical heated duct
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Two-Phase Micro-channel Flow
Inlet temperature versus effective heat flux for
G228kg/m2s and Tin 30 and 60 oC
Schematic representation of observed vapor back
flow as heat flux approaches CHF
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Parameters for Critical Heat Flux (CHF)
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Questions ?
120 billion transistors in 300mm wafer