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June 28, 2026MicromachinesOpen Access

Decoupling Thermal and Hydraulic Performance in Cross-Flow Micro Heat Exchangers via Mixed-Geometry Channel Designs

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Authors

QZQuanyi ZhouZCZheng ChangQWQi Wang

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Overview

Randomized trial investigates mixed-geometry channels to improve thermal and hydraulic performance in micro heat exchangers, suggesting new design strategies.

Key Points

  • This research aims to explore mixed-geometry channel designs to enhance thermal and hydraulic performance in micro heat exchangers.
  • Utilized a three-dimensional conjugate heat transfer model to simulate water flow through stainless-steel micro-matrix channels.
  • Investigated the effects of varying channel geometries and spacings on performance metrics at low Reynolds numbers (100 to 200).
  • Examined the relationship between transverse microchannel spacing and Nusselt number while measuring pressure gradient.
  • Increasing transverse microchannel spacing from 10 to 60 μm raised the Nusselt number from 1.15 to 2.07 without altering pressure gradient significantly.
  • Corner-induced flow redistribution improved thermal boundary layer, leading to better performance beyond macroscale predictions.
  • Pure square channels maximized heat transfer, while hybrid circular-square configurations optimized hydraulic efficiency.

Cite This Study

Zhou et al. (2026) studied this question.

synapsesocial.com/papers/6a40bb4561bb0a67205c6e78https://doi.org/10.3390/mi17070776
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