Eddy Dynamics and Kinematics of Convective Turbulence

1998 ◽  
pp. 41-82 ◽  
Author(s):  
J. C. R. Hunt
Keyword(s):  
Convective Turbulence ◽  
Eddy Dynamics

Overview Of The Frontal Eddy Dynamics Study (FRED*) Off North Carolina

2005 ◽  
Author(s):  
C.C. Ebbesmeyer ◽  
G.S. Rosenthal ◽  
K.A. Kurrus ◽  
C.A. Coomes
Keyword(s):  
North Carolina ◽  
Eddy Dynamics

An Air Curtain Along a Wall With High Inlet Turbulence

2004 ◽  
Vol 126 (3) ◽  
pp. 391-398 ◽  
Author(s):  
Brandon S. Field ◽  
Eric Loth
Keyword(s):  
Ambient Air ◽  
Reynolds Numbers ◽  
Velocity Fields ◽  
Air Curtain ◽  
Image Velocimetry ◽  
Number Variation ◽  
Inflow Turbulence ◽  
High Turbulence ◽  
Isothermal Wall ◽  
Eddy Dynamics

A downward blowing isothermal wall jet at moderate Reynolds numbers (1,500 to 8,500) with significant inflow turbulence (ca. 6%) was investigated. The flow configuration is an idealization of the air curtains of refrigerated display cases. Flow visualization using particle seeding was employed to identify the flow field eddy dynamics. Particle Image Velocimetry was used to examine the velocity fields in terms of mean and fluctuating values. These diagnostics showed that the air curtain entrainment was dominated by a large variety of eddies that engulfed ambient air into the air curtain. The velocity fields generally showed linear spreading, significant deceleration and high turbulence levels (ca. 25%). It was observed that the air curtain dynamics, velocity fields and growth were not significantly sensitive to Reynolds number variation between Re=3,800 and Re=8,500. However, at low air velocities (Re=1,500), the curtain was found to detach, leading to a large air curtain thickness and high curtain entrainment.

scholarly journals Study of the Dynamics of Convective Turbulence in the Solar Granulation by Spectral Line Broadening and Asymmetry

2020 ◽  
Vol 890 (2) ◽  
pp. 138 ◽  
Author(s):  
Ryohtaroh T. Ishikawa ◽  
Yukio Katsukawa ◽  
Takayoshi Oba ◽  
Motoki Nakata ◽  
Kenichi Nagaoka ◽  
...  
Keyword(s):  
Spectral Line ◽  
Line Broadening ◽  
Solar Granulation ◽  
Convective Turbulence ◽  
Spectral Line Broadening

DECAY OF CONVECTIVE TURBULENCE REVISITED

1997 ◽  
Vol 82 (3) ◽  
pp. 503-517 ◽  
Author(s):  
Zbigniew Sorbjan
Keyword(s):  
Convective Turbulence

Advancing the simulation of mesoscale eddies: Backscatter schemes in eddy-permitting ocean simulations

2021 ◽  
Author(s):  
Stephan Juricke ◽  
Sergey Danilov ◽  
Marcel Oliver ◽  
Nikolay Koldunov ◽  
Dmitry Sidorenko ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Large Scale ◽  
Mesoscale Eddy ◽  
Ocean Model ◽  
Mean Flow ◽  
Ocean Coupling ◽  
Climate Simulations ◽  
Flow Interactions ◽  
To Come ◽  
Eddy Dynamics

<p>Capturing mesoscale eddy dynamics is crucial for accurate simulations of the large-scale ocean currents as well as oceanic and climate variability. Eddy-mean flow interactions affect the position, strength and variations of mean currents and eddies are important drivers of oceanic heat transport and atmosphere-ocean-coupling. However, simulations at eddy-permitting resolutions are substantially underestimating eddy variability and eddy kinetic energy many times over. Such eddy-permitting simulations will be in use for years to come, both in coupled and uncoupled climate simulations. We present a set of kinetic energy backscatter schemes with different complexity as alternative momentum closures that can alleviate some eddy related biases such as biases in the mean currents, in sea surface height variability and in temperature and salinity. The complexity of the schemes reflects in their computational costs, the related simulation improvements and their adaptability to different resolutions. However, all schemes outperform classical viscous closures and are computationally less expensive than a related necessary resolution increase to achieve similar results. While the backscatter schemes are implemented in the ocean model FESOM2, the concepts can be adjusted to any ocean model including NEMO.</p>

The Simulation of Dispersion by Convective Turbulence in the Atmosphere

1987 ◽  
pp. 143-149
Author(s):  
F. T. M. Nieuwstadt ◽  
J. P. J. M. M. de Valk
Keyword(s):  
Convective Turbulence

scholarly journals Anisotropic particles in two-dimensional convective turbulence

2020 ◽  
Vol 32 (2) ◽  
pp. 023305 ◽  
Author(s):  
Enrico Calzavarini
Keyword(s):  
Two Dimensional ◽  
Anisotropic Particles ◽  
Convective Turbulence

Long-wave decay due to convective turbulence

1976 ◽  
Vol 73 (3) ◽  
pp. 427-444 ◽  
Author(s):  
Theodore Green ◽  
See Whan Kang
Keyword(s):  
Simple Model ◽  
Rayleigh Number ◽  
Reynolds Stress ◽  
Decay Estimate ◽  
Oscillating Flow ◽  
Convective Turbulence ◽  
Decay Component ◽  
Wave Decay ◽  
Long Wave ◽  
Rectangular Basin

Long waves are generated in a laboratory-size rectangular basin, which is heated uniformly from below. Their subsequent decay is measured, and the decay component due to the action of convective turbulence isolated, using a combination of existing theories and interpretation techniques. An expression is proposed for the turbulent decay decrement as a function of the bulk Rayleigh number. The results agree as well as can be expected with a simple model based on a Reynolds-stress decay estimate obtained by superposing convective thermals on the oscillating flow associated with the long wave.

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