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Numerical Study of Double-Layered Microchannel Heat Sinks with Different Cross-Sectional Shapes
Daxiang Deng1,2, Guang Pi1, Weixun Zhang1
1Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China.
Entropy (Basel, Switzerland)
|December 3, 2020
Summary
Double-layered microchannel heat sinks (DL-MCHS) offer superior cooling for electronics compared to single-layered designs. Rectangular DL-MCHS provide the best thermal performance, while Ω-shaped offer the lowest power consumption.
Area of Science:
- Heat Transfer
- Fluid Dynamics
- Microfluidics
Background:
- Effective thermal management is critical for high heat flux microelectronic devices.
- Microchannel heat sinks are essential for dissipating heat in compact electronic systems.
- Double-layered microchannel heat sinks (DL-MCHS) present a potential advancement over traditional single-layered designs.
Purpose of the Study:
- To numerically investigate the thermal and hydraulic performance of DL-MCHS.
- To compare the performance of DL-MCHS with single-layered microchannel heat sinks (SL-MCHS).
- To evaluate various cross-sectional shapes for DL-MCHS, including triangular, rectangular, trapezoidal, circular, and reentrant Ω-shaped.
Main Methods:
- Numerical simulations were employed to analyze heat transfer and fluid flow.
- Performance metrics included wall temperature, thermal resistance, temperature distribution, pressure drop, and pumping power.
- Comparative analysis was conducted between DL-MCHS and SL-MCHS configurations.
Main Results:
- DL-MCHS significantly reduced wall temperatures and thermal resistance compared to SL-MCHS.
- DL-MCHS exhibited more uniform wall temperature distributions.
- Rectangular DL-MCHS demonstrated optimal thermal performance, while reentrant Ω-shaped DL-MCHS minimized pumping power.
Conclusions:
- DL-MCHS offer substantial improvements in thermal management for microelectronic devices.
- The optimal DL-MCHS design depends on whether thermal performance or power efficiency is prioritized.
- Rectangular and reentrant Ω-shaped microchannels represent promising configurations for specific application needs.
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