### Abstract

This work applies topology optimisation to the design of passive coolers for light-emitting diode (LED) lamps.
The heat sinks are cooled by the natural convection currents arising from the temperature difference between the
LED lamp and the surrounding air. A large scale parallel computational framework is used to perform topology
optimisation for minimising the temperature of the LED package subjected to highly convection-dominated heat
transfer.
The governing equations are the steady-state incompressible Navier-Stokes equations coupled to the thermal
convection-diffusion equation through the Bousinessq approximation. The fully coupled non-linear multiphysics
system is discretised using stabilised trilinear equal-order finite elements and solved using Newtons method and a
multigrid-preconditioned iterative method. Topology optimisation is carried out using the density-based approach.
The optimisation results show interesting features that are currently being incorporated into industrial designs
for enhanced passive cooling abilities.

Original language | English |
---|---|

Title of host publication | Proceedings of WCSMO-11 |

Number of pages | 5 |

Publication date | 2015 |

Publication status | Published - 2015 |

Event | 11th World Congress of Structural and Multidisciplinary Optimization - University of Sydney, Sydney , Australia Duration: 7 Jun 2015 → 12 Jun 2015 http://www.aeromech.usyd.edu.au/WCSMO2015/index.html |

### Conference

Conference | 11th World Congress of Structural and Multidisciplinary Optimization |
---|---|

Location | University of Sydney |

Country | Australia |

City | Sydney |

Period | 07/06/2015 → 12/06/2015 |

Internet address |

### Keywords

- Topology optimisation
- Passive cooler
- LED lamp
- Heat sink design
- Natural convection

## Cite this

Alexandersen, J. (2015). Topology optimisation of passive coolers for light-emitting diode lamps. In

*Proceedings of WCSMO-11*