In recent years, microchannel heat sinks have increasingly
been designed using mathematical approaches such as topology
optimization. This tactic can lead to novel heat sink lay-outs
with enhanced performance over existing designs. Physics dictate
a preference towards very short and small channels for the
cooling fluid, benefiting the heat transfer performance. However,
the feature size depends on the coarseness of the numerical grid
used in the optimization, and very fine designs can simply not
be manufactured using existing technologies. In structural optimization,
mesh-independent filtering methods are used to ensure
grid independence and manufacturability.
In this research, design and sensitivity filtering are tested
within liquid cooling microchannel heat sink topology optimization.
The optimized designs are evaluated with a focus on the
level of grid independence and manufacturability that can be
achieved through incorporation of these methods. Additionally,
a mutual comparison of both filter methods is performed. Results
indicate that for unconstrained optimization problems and under
certain conditions relating the filters, it can be proven that both
methods will lead to identical results.
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .