Reduced order optimization of internal channel heat sink designs

The recent growth in electronics power density has created a significant need for effective thermal management solutions. Liquid-cooled heat sinks or cold plates are typically used to achieve high volumetric power density cooling. A natural trade-off exists between the thermal and hydraulic performance of a cold plate, creating an opportunity for design optimization. Current design optimization methods rely on computationally expensive and time-consuming computational fluid dynamics (CFD) simulations. Here, we develop a rapid design optimization tool for liquid cooled heat sinks based on reduced order models for the thermal-hydraulic behavior. Flow layout is expressed as a combination of simple building blocks on a divided coarse grid. The flow layout and geometrical parameters are incorporated to optimize designs that can effectively address heterogeneous cooling requirements within electronics packages. Layout optimization problem of assigning flow blocks on elements of the coarse grid is solved using discrete optimization method. Modifying the expression of flow block in terms of design variables and evaluating non-trivial objective function for partially complete flow layouts coupled with a multi-start approach to improve the probability of finding flow layouts with optimal performance. Gradient-based optimizer enables rapid optimization of internal diameters of the flow blocks for a given flow layout in geometry optimization.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2022

Author dc:creator

• Lad, Aniket Ajay

Contributors dc:contributor

• Miljkovic, Nenad

• Design Optimization
• Electronics Cooling
• Thermal Management
• Additive Manufacturing
• Channel Flow

Statement dc:rights

• Copyright 2022 Aniket Ajay Lad

Language dc:language

en, eng

Handle dc:identifier

https://hdl.handle.net/2142/115648

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F115648