TY - JOUR

T1 - An efficient and accurate DSRFG method via nonuniform energy spectra discretization

AU - Wang, Xiangjie

AU - Cai, C. S.

AU - Yuan, Peng

AU - Xu, Guoji

AU - Sun, Chao

N1 - Funding Information: This research is funded by the Economic Development Assistantship from Louisiana State University, USA , and the Louisiana Board of Regents RCS, USA project [ LEQSF(2022-23)-RD-A-14 ]. The simulation was implemented using the high-performance computing resources at Louisiana State University. The authors are grateful for all the support.

PY - 2024/1/1

Y1 - 2024/1/1

N2 - An appropriate set-up of inflow boundary conditions is crucial for accurate prediction of wind effects on the target structures using Large Eddy Simulation (LES). The discretizing and synthesizing random flow generation (DSRFG) method is a commonly used method which however requires considerable computational cost. This paper attempts to improve the efficiency and accuracy of the DSRFG method by modifying the way of discretizing the energy spectra. Since the DSRFG method is originated from the Kraichnan's method, the grid effects on both methods are analyzed theoretically and examined numerically. Research results show that the Kraichnan's method is sensitive to the grid effects while the improved DSRFG method is slightly affected. Additionally, the improved DSRFG method is applied to simulate the wind effects on a low-rise building by LES and the results agree well with the NIST aerodynamic database.

AB - An appropriate set-up of inflow boundary conditions is crucial for accurate prediction of wind effects on the target structures using Large Eddy Simulation (LES). The discretizing and synthesizing random flow generation (DSRFG) method is a commonly used method which however requires considerable computational cost. This paper attempts to improve the efficiency and accuracy of the DSRFG method by modifying the way of discretizing the energy spectra. Since the DSRFG method is originated from the Kraichnan's method, the grid effects on both methods are analyzed theoretically and examined numerically. Research results show that the Kraichnan's method is sensitive to the grid effects while the improved DSRFG method is slightly affected. Additionally, the improved DSRFG method is applied to simulate the wind effects on a low-rise building by LES and the results agree well with the NIST aerodynamic database.

KW - Computational efficiency

KW - DSRFG

KW - Grid effects

KW - Inflow generation method

KW - Large eddy simulation (LES)

UR - http://www.scopus.com/inward/record.url?scp=85175494585&partnerID=8YFLogxK

U2 - 10.1016/j.engstruct.2023.117014

DO - 10.1016/j.engstruct.2023.117014

M3 - Article

AN - SCOPUS:85175494585

VL - 298

JO - Engineering structures

JF - Engineering structures

SN - 0141-0296

M1 - 117014

ER -