首页|Comparison of DES and URANS:Estimation of fluctuating pressure from URANS simulations in stilling basins

Comparison of DES and URANS:Estimation of fluctuating pressure from URANS simulations in stilling basins

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
This study conducts a comparative analysis between detached eddy simulation(DES)and Unsteady Reynolds-averaged Navier-Stokes(URANS)models for simulating pressure fluctuations in a stilling basin,aiming to assess the URANS mode's performance in modeling pressure fluctuation.The URANS model predicts accurately a smoother flow field and its time-average pressure,yet it underestimates the root mean square of pressure(RMSP)fluctuation,achieving approximately 70％of the results predicted by DES model on the bottom floor of the stilling basin.Compared with DES model's results,which are in alignment with the Kolmogorov-5/3 law,the URANS model significantly overestimates low-frequency pulsations,particularly those below 0.1 Hz.We further propose a novel method for estimating the RMSP in the stilling basin using URANS model results,based on the establishment of a quantitative relationship between the RMSP,time-averaged pressure,and turbulent kinetic energy in the boundary layer.The proposed method closely aligns with DES results,showing a mere 15％error level.These findings offer vital insights for selecting appropriate turbulence models in hydraulic engineering and provide a valuable tool for engineers to estimate pressure fluctuation in stilling basins.

Detached eddy simulation(DES)modelnumerical simulationpressure fluctuationstill basinunsteady Reynolds-averaged Navier-Stokes(URANS)model

Kang Liu、Hao-ran Wang、Yong-can Chen、Hui Xie、Zhao-Wei Liu

展开 >

State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China

Sichuan Energy Internet Research Institute,Tsinghua University,Chengdu 610042,China

School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu 610500,China

Key Research and Development Plan Project of ChinaNational Natural Science Foundation of China

2022YFC3204602U21A20157

2024

10.1007/s42241-024-0055-1

水动力学研究与进展B辑
中国船舶科学研究中心

水动力学研究与进展B辑

CSTPCDEI
影响因子：0.596
ISSN：1001-6058
年,卷(期)：2024.36(4)
  • 1