Structural Topology Design Optimization Of Cooling Device Under High Heat Flux

High heat flux cooling device(heat sink)has been widely used in the industrial ap-plications such as electronic chip cooling,aviation and aerospace cooling units,etc.Liq-uid cooled heat sink shows great potential regarding to the excellent heat dissipation ca-pacity and low price.In order to design channel layout with desirable flow and thermal performances,a flexible design approach termed topology optimization(TO)has become one of the research frontier since it gives high degree of design freedom and can be used to develop the optimal structural layout very efficiently.Recently,TO method has become an active research field to design cooling channel layout.However,there are still some drawbacks as follows:few research work has dis-cussed the relationship between the cooling channel layouts designed by TO and the flow and thermal performances.Additionally,there is limited research work that has studied the TO application with respect to the complex heat load condition.To address the above mentioned problems,first,the TO problem is studied based on different objective functions:min.power dissipation,max.heat exchange,and multi-ob-jective.A PDE based density filter is used to overcome the numerical difficulties.The hyperbolic tangent projection is employed to obtain a clear topology configuration.And the continuation approach is used to reduce the probability of the local optima.Then,the impact of different inlet/outlet setups,initial guesses,weighting factors,and heat load conditions on the cooling channel layout are discussed.Lastly,the thermal and flow per-formances of the optimized channel layout as well as a parallel channel design are ana-lyzed numerically and experimentally.The research findings can be summed up as:(1)the proposed TO method can be used to design liquid cooling channel based on different objective subjected to complicated heat load conditions.(2)The inlet/outlet setup,Reynolds number,and initial guess can affect the final topology.(3)The optimized chan-nel can reduce the temperature,the pressure drop,and the thermal resistance in compari-son to the parallel channel,while gives a larger Nusselt number.To conclude,a complete development cycle for the liquid-cooled heat sink has been implemented successfully in this thesis.The research finding can be used to translate the TO results into the industrial cooling products in an affordable and efficient way.