An Evolutionary Optimization Method to Design Shapes of Flow Channels

Abstract

This paper develops an evolutionary optimization method to design flow channel shapes and reduce the pressure drop. The optimization method includes three steps. Firstly, an initial channel shape is given, and the original velocity field can be simulated numerically. Then by adding a virtual body force to the original flow field, the optimal flow pattern can be constructed with minimum viscous dissipation. Finally, the fluid cells having lower dynamic pressure are automatically substituted with the solid zones in the constructed flow pattern. This process is repeated until the channel volume constraint is satisfied, and the optimal channel shape can be obtained. To demonstrate the validity of the multistep evolution optimization method, three numerical examples are presented, including a T-shape channel, a bend and a diffuser.