Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 16, 2019 - September 18, 2019
In this study, we consider a simple flow field around a circular cylinder discretized by multi-block Cartesian meshes. Block-wise switching of full-order model (FOM) and proper orthogonal decomposition (POD)-based reduced-order model (ROM) is conducted to realize a FOM/ROM hybrid prediction of the flow field. The FOM and ROM are switched dynamically during the unsteady flow simulation by in-situ evaluation of the ROM accuracy in comparison with FOM. The accuracy of the FOM/ROM hybrid prediction was evaluated by comparing with the FOM prediction with the same flow conditions. It is expected with the present approach that data-driven methods such as the POD-based ROM can be utilized to accelerate time consuming unsteady flow simulation.
