2021 Volume 2021 Pages 20210010
Reduced order model based on the Galerkin Projection was applied to the 2D cavity flow under high Reynolds number conditions and the swirling flow analysis in pipings, and the calculation accuracy and the effect of shortening the calculation time of the flow analysis using the reduced order model were examined. (1) The calculation accuracy of the reduced order model constructed with 40 bases was 2.64% for the 2D cavity flow under the condition of Reynolds number=105, which was 87 times faster than the three-dimensional fluid analysis. (2) The calculation accuracy of the reduced order model constructed with 6 bases was 0.43% for the simulated piping flow under the condition of Reynolds number=104, which was 38 times faster than the three-dimensional fluid analysis.
