[1805] - Parameters for the collapse of turbulence in the stratified plane Couette flow

All available metadata of the dataset are listed below. Some features are available, e.g. download of dataset or additional description file.

van Hooijdonk, I. G. S., Clercx, H. J. H., Ansorge, C., Moene, A. F., van de Wiel, B. J. H., 2018. Parameters for the collapse of turbulence in the stratified plane Couette flow. Journal of the Atmospheric Sciences, 75 (9), 3211 - 3231. DOI: 10.1175/JAS-D-17-0335.1.
Title(s):Main Title: Parameters for the collapse of turbulence in the stratified plane Couette flow
Description(s):Abstract: We perform direct numerical simulation of the Couette flow as model for the stable boundary layer. The flow evolution is investigated for combinations of the (bulk) Reynolds number and the imposed surface buoyancy flux. First, we establish what the similarities and differences are between applying a fixed buoyancy difference (Dirichlet) or a fixed buoyancy flux (Neumann) as boundary conditions. Moreover, two distinct parameters were recently proposed for the the turbulent-to-laminar transition: the Reynolds number based on the Obukhov length; and the ’shear capacity’, a velocity scale ratio based on the buoyancy flux-maximum. We study how these parameters relate to each other and to the atmospheric boundary layer. The results show that in a weakly stratified equilibrium state the flow statistics are virtually the same between the different types of boundary condition. However, at stronger stratification and, more generally in non-equilibrium conditions the flow statistics do depend on the type of boundary condition imposed. In the case of Neumann boundary conditions, a clear sensitivity to the initial stratification strength is observed due to the existence of multiple equilibria, while for Dirichlet boundary conditions only one statistically steady turbulent equilibrium exists for a particular set of boundary conditions. As in previous studies, we find that when the imposed surface flux is larger than the maximum buoyancy flux, no turbulent steady-state occurs. Analytical investigation and simulation data indicate that this maximum buoyancy flux converges for increasing Reynolds numbers, which suggests a possible extrapolation to the atmospheric case.
Identifier(s):DOI: 10.1175/JAS-D-17-0335.1
ISSN: 0022-4928
URL: http://journals.ametsoc.org/doi/pdf/10.1175/JAS-D-17-0335.1
Responsible Party
Creator(s):Author: Ivo G S van Hooijdonk
Author: Herman J H Clercx
Author: Cedrick Ansorge
Author: Arnold F. Moene
Author: Bas J H van de Wiel
Funding Reference(s):Netherlands Organisation for Scientific Research (NWO ALW): 832010110: --
European Research Council (ERC): 648666: Collapse Of Atmospheric Turbulence
Deutsche Forschungsgemeinschaft (DFG): CRC/TRR 32: Patterns in Soil-Vegetation-Atmosphere Systems: Monitoring, Modelling and Data Assimilation
Publisher:American Meteorological Society
TR32 Topic:Atmosphere
Related Sub-project(s):C7
Subject(s):CRC/TR32 Keywords: 2m-Temperature, 10m-Wind Speed, Atmosphere–Land Interaction, Atmospheric Stability, Boundary Layer, Meteorology, Numerical Simulation, Planetary Boundary Layer, Surface Fluxes, Turbulence
DDC: 532 Fluid mechanics; Liquid mechanics, 550 Earth sciences
GEMET Inspire Spatial Data Theme: Atmospheric conditions
Topic Category:ClimatologyMeteorologyAtmosphere
File Details
File Name:jas.pdf
Data Type:Text
File Size:15390 kB (15.029 MB)
Date(s):Available: 2018-06-28
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
North:-no map data
Measurement Region:None
Measurement Location:--None--
Specific Informations - Publication
Article Type:Journal
Source:Journal of the Atmospheric Sciences
Number Of Pages:20
Page Range:3211 - 3231
Metadata Details
Metadata Creator:Cedrick Ansorge
Metadata Created:2018-08-02
Metadata Last Updated:2018-08-03
Funding Phase:3
Metadata Language:English
Metadata Version:V43
Metadata Export
Metadata Export:
Export XML
Dataset Metrics
Page Visits:114
Metadata Downloads:0
Dataset Downloads:0
Dataset Activity