Aerodynamic interference and flow field mechanisms of three-dimensional tandem square cylinders based on proper orthogonal decomposition and high-order dynamic mode decomposition modeling

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(5)

Published: May 1, 2025

This work proposes a novel reduced-order model that integrates proper orthogonal decomposition (POD) and high-order dynamic mode (HODMD) to explore the dominant aerodynamic modes interference mechanisms of three-dimensional finite-length tandem square cylinders. By leveraging POD extract spatially characteristics integrating HODMD's amplitude-dominant identify those significantly contributing effects, results demonstrate POD-HODMD can be effectively applied study effects in cylinders, providing robust method for analysis complex flow field data. The influence structures within vortex shedding frequency bandwidth, various structural spacings modify positions shear layer separation reattachment, as well their combined with inter-structural on pressure distribution patterns each surface structures. vary across different ranges. Low-frequency reshape gap distributions velocity orientations at ends, while high-frequency mid-span plane wake continuity disturbed structure. causes vortices become fuller larger scale. technology not only provides systematic analyzing but also deepens insight into intricate dance fluid–structure interactions such configurations.

Language: Английский

Prediction of fluid-thermal-structure interaction of three equilateral-triangular circular cylinders based on XGBoost-SHAP

Ocean Engineering, Journal Year: 2025, Volume and Issue: 333, P. 121558 - 121558

Published: May 17, 2025

Language: Английский