Application of Proper Orthogonal Decomposition Method to Swirling Flow Analysis in Pipings

Abstract

Abstract. To shorten the calculation time of 3D fluid analysis for piping systems, proper orthogonal decomposition method was applied to swirling flow analysis in the piping, and the accuracy of the flow field using the extracted basis space was examined. It was confirmed that the approximation accuracy by using the basis space increases when the number of the Reynolds number and the basis number are increased for both steady and unsteady flows. In the unsteady flow, it was found that number of samples in the direction of time have a small effect on the approximation accuracy by using the basis space.