Shahrekord University Journal of Microfluidic and Nanofluidic Research 2 4 2025 12 01 A Review of Microchannel Heat Sinks 180 187 116665 10.22034/jmnr.2025.116665 EN Akram Jahanbakhshi University of Applied Sciences Journal Article The progressive miniaturization of electronic components alongside escalating power densities has generated unprecedented thermal management challenges, with heat flux values attaining 10⁴ W/cm² in specialized applications. Microchannel heat sinks (MCHSs) have established themselves as a highly effective cooling solution owing to their exceptional heat dissipation capacity and favorable surface-area-to-volume characteristics. This review synthesizes findings from previous investigations, encompassing heat transfer enhancement approaches, including rib structures, cavity configurations, pin-fin arrays, and biomimetic designs, advanced working fluids, flow instability phenomena, machine learning implementations, and multi-objective optimization strategies. https://jmnr.sku.ac.ir/article_116665_18c68edfe5727c9c71a15e19fdf54fe0.pdf