DOI: 10.1002/2015GL063147
论文题名: Evaluation of the inertial dissipation method within boundary layers using numerical simulations
作者: Jabbari A. ; Boegman L. ; Piomelli U.
刊名: Geophysical Research Letters
ISSN: 0094-8924
EISSN: 1944-8655
出版年: 2015
卷: 42, 期: 5 起始页码: 1504
结束页码: 1511
语种: 英语
英文关键词: convection velocity
; dissipation
; inertial method
; Kolmogorov constants
; numerical simulations
; turbulent flows
Scopus关键词: Boundary layers
; Capillary flow
; Channel flow
; Computational fluid dynamics
; Computer simulation
; Energy dissipation
; Kinetic energy
; Kinetics
; Numerical models
; Spectroscopy
; Turbulent flow
; Velocity
; Convection velocity
; Inertial dissipation method
; Inertial method
; Kolmogorov constant
; Local mean velocity
; Rate of dissipation
; Turbulent channel flows
; Turbulent kinetic energy
; Numerical methods
; boundary layer
; channel flow
; dissipation
; kinetic energy
; numerical model
英文摘要: We evaluated the accuracy of the inertial dissipation method to estimate the rate of dissipation of turbulent kinetic energy within boundary layers by performing well-resolved numerical simulations of turbulent channel flows and comparing the dissipation calculated directly from the data, with that deduced from the frequency spectra. The convection velocity, commonly used to convert frequency spectra into wave number spectra is found to be larger than the local mean velocity by approximately a factor of 2 near the bed and about 10% in the logarithmic layer and beyond. Usage of the standard Kolmogorov constants (particularly in the vertical and spanwise directions) also leads to significant errors (50% or more) in computation of dissipation. Usage of the optimal Kolmogorov constants and the convection velocity, obtained from the simulation results could result in improved accuracy in dissipation calculation with the inertial method. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925745540&doi=10.1002%2f2015GL063147&partnerID=40&md5=71ccb2141ae35c6f2fdf28548624c01a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8540
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Environmental Fluid Dynamics Laboratory, Department of Civil Engineering, Queen's University, Kingston, ON, Canada
Recommended Citation:
Jabbari A.,Boegman L.,Piomelli U.. Evaluation of the inertial dissipation method within boundary layers using numerical simulations[J]. Geophysical Research Letters,2015-01-01,42(5).