Phasor-Based Dehomogenisation for Microchannel Cooling Topology Optimisation
Year: 2025
Type: conference-paper
Abstract: Efficient thermal management is critical for highpower electronics, with microchannel cooling providing enhanced heat dissipation in compact designs. Conventional topology optimisation (TO) methods often fail to capture fine-scale features without relying on extremely fine meshes, leading to high computational costs. This study proposes a homogenisationbased TO framework integrated with an on-the-fly phasorbased dehomogenisation technique. The phasor-based method efficiently maps homogenised designs to fine-scale microchannel networks, maintaining continuous variations in channel properties and improving robustness while reducing computational expense compared to the conventional projection-based method. An idealised two-dimensional chip with heterogeneous heat generation is used to demonstrate the integrated design workflow. The homogenisation-based TO is performed on a coarse $50 \times 50 \mathrm{mesh}$, with the phasor-based dehomogenisation reconstructing fine-scale microchannel networks on a $3213 \times 3213$ mesh. The results show that the framework achieves a three orders-of-magnitude reduction in computational cost compared to hypothetical brute-force full-scale optimisation and a $\mathbf{3 5. 3} \%$ improvement in thermal performance over traditional pin-fin designs (the initial guess). Limitations of the current study, such as refining the homogenisation model and incorporating irregular meshes, point to promising directions for future investigations.
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Awards: G5357958133, G8413439237
OpenAlex ID: W4405427612