TY - JOUR
T1 - Enhanced multi-objective optimization of a microchannel heat sink through evolutionary algorithm coupled with multiple surrogate models
AU - Husain, Afzal
AU - Kim, Kwang Yong
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant No. 2009-0083510 funded by the Korean government(MEST) through Multi-phenomena CFD Engineering Research Center.
PY - 2010/9
Y1 - 2010/9
N2 - A liquid flow microchannel heat sink has been optimized with the help of three-dimensional numerical analysis and multiple surrogate methods. Two objective functions, thermal resistance and pumping power have been selected to assess the performance of the microchannel heat sink. The design variables related to the width of the microchannel at the top and bottom, depth of the microchannel, and width of fin, which contribute to objective functions, have been identified and a three-level full factorial design was selected to exploit the design space. The numerical solutions obtained at these design points were utilized to construct surrogate models, namely Response Surface Approximations, Kriging and Radial Basis Neural Network. A hybrid multi-objective evolutionary algorithm coupled with surrogate models is applied to find out global Pareto-optimal solutions. The accuracy of the surrogate models has been discussed in view of their predictions and trade-off analysis was performed in view of conflicting nature of the two objectives. The Pareto-optimal sensitivity of the design variables has been found out to economically compromise with the design variables. The application of the multiple surrogate methods not only improves quality of multi-objective optimization but also gives the feedback of the fidelity of the optimization model.
AB - A liquid flow microchannel heat sink has been optimized with the help of three-dimensional numerical analysis and multiple surrogate methods. Two objective functions, thermal resistance and pumping power have been selected to assess the performance of the microchannel heat sink. The design variables related to the width of the microchannel at the top and bottom, depth of the microchannel, and width of fin, which contribute to objective functions, have been identified and a three-level full factorial design was selected to exploit the design space. The numerical solutions obtained at these design points were utilized to construct surrogate models, namely Response Surface Approximations, Kriging and Radial Basis Neural Network. A hybrid multi-objective evolutionary algorithm coupled with surrogate models is applied to find out global Pareto-optimal solutions. The accuracy of the surrogate models has been discussed in view of their predictions and trade-off analysis was performed in view of conflicting nature of the two objectives. The Pareto-optimal sensitivity of the design variables has been found out to economically compromise with the design variables. The application of the multiple surrogate methods not only improves quality of multi-objective optimization but also gives the feedback of the fidelity of the optimization model.
KW - Electronic cooling
KW - Evolutionary algorithm
KW - Multi-objective optimization
KW - Multiple surrogate analysis
KW - Numerical simulation
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U2 - 10.1016/j.applthermaleng.2010.03.027
DO - 10.1016/j.applthermaleng.2010.03.027
M3 - Article
AN - SCOPUS:77955272546
SN - 1359-4311
VL - 30
SP - 1683
EP - 1691
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
IS - 13
ER -