Multi-scale topology optimisation of microchannel cooling using a homogenisation-based method - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year : 2024

Multi-scale topology optimisation of microchannel cooling using a homogenisation-based method

Hao Li
  • Function : Correspondent author
  • PersonId : 1390645

Connectez-vous pour contacter l'auteur
Joe Alexandersen
  • Function : Author
  • PersonId : 1273574

Abstract

Microchannel cooling is often the preferred choice for compact heat sinks. However, widely adopted topology optimisation (TO) techniques, such as density-based and level-set methods, often struggle to generate very thin channel strips without imposing maximum length scale constraints. To address this limitation, multi-scale design methodologies have emerged. This paper builds upon recent advances in de-homogenisation techniques to contribute to the multi-scale design of microchannels for cooling applications. We start by selecting a single-class microstructure and employ numerical homogenisation to build an offline library. This library is then fed in online macro-scale topology optimisation, where both microstructure parameters and local orientation fields are optimised. By using a sawtooth-function-based mapping, the de-homogenised results capture fine details across different length scales through a unique homogenised design. Our findings show that the generated microchannels outperform conventional pillar arrays, offering valuable insights for heat sink designers. Additionally, imperfections observed in the de-homogenised results serve as benchmarks for future improvements, addressing concerns related to modelling accuracy, manufacturability, and overall performance enhancements.
Fichier principal
Vignette du fichier
MultScaHeatSink.pdf (14.99 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04607025 , version 1 (10-06-2024)

Licence

Identifiers

  • HAL Id : hal-04607025 , version 1

Cite

Hao Li, Pierre Jolivet, Joe Alexandersen. Multi-scale topology optimisation of microchannel cooling using a homogenisation-based method. 2024. ⟨hal-04607025⟩
106 View
56 Download

Share

Gmail Mastodon Facebook X LinkedIn More