An algebraic model for nonisotropic turbulent dissipation rate in Reynolds stress closures

1990 ◽  
Vol 2 (10) ◽  
pp. 1859-1866 ◽  
Author(s):  
Magnus Hallbäck ◽  
Johan Groth ◽  
Arne V. Johansson
Keyword(s):  
Reynolds Stress ◽  
Dissipation Rate ◽  
Algebraic Model ◽  
Turbulent Dissipation ◽  
Turbulent Dissipation Rate

scholarly journals Observations of Convective Thermals with Weather Radar

2017 ◽  
Vol 34 (7) ◽  
pp. 1585-1590 ◽  
Author(s):  
Valery Melnikov ◽  
Dusan S. Zrnić
Keyword(s):  
Dissipation Rate ◽  
Weather Radar ◽  
Radar Observations ◽  
Turbulent Dissipation ◽  
Turbulent Dissipation Rate ◽  
Rise Rate ◽  
Differential Reflectivity

AbstractIt is shown that the NEXRAD weather radar with enhanced detectability is capable of observing the evolution of convective thermals. The fields of radar differential reflectivity show that the upper parts of the thermals are observable due to Bragg scatter, whereas scattering from insects dominates in the lower parts. The thermal-top rise rate is between 1.5 and 3.7 m s−1 in the analyzed case. Radar observations of thermals also enable estimations of their maximum heights, horizontal sizes, and the turbulent dissipation rate within each thermal. These attributes characterize the intensity of convection.

Turbulent Dissipation Rate In The Boundary Layer Via UHF Wind Profiler Doppler Spectral Width Measurements

2002 ◽  
Vol 103 (3) ◽  
pp. 361-389 ◽  
Author(s):  
Sandra Jacoby-Koaly ◽  
B. Campistron ◽  
S. Bernard ◽  
B. Bénech ◽  
F. Ardhuin-Girard ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Dissipation Rate ◽  
Spectral Width ◽  
Wind Profiler ◽  
Turbulent Dissipation ◽  
Turbulent Dissipation Rate ◽  
Width Measurements ◽  
Uhf Wind Profiler

scholarly journals Evaluation of turbulent dissipation rate retrievals from Doppler cloud radar

2012 ◽  
Vol 5 (1) ◽  
pp. 747-774 ◽  
Author(s):  
M. D. Shupe ◽  
I. M. Brooks ◽  
G. Canut
Keyword(s):  
Dissipation Rate ◽  
Doppler Velocity ◽  
Data Sets ◽  
Tethered Balloon ◽  
Validation Data ◽  
Turbulent Dissipation ◽  
Turbulent Dissipation Rate ◽  
Cloud Radar ◽  
Stratocumulus Clouds

Abstract. Turbulent dissipation rate retrievals from cloud radar Doppler velocity measurements are evaluated using independent, in situ observations in Arctic stratocumulus clouds. In situ validation data sets of dissipation rate are derived using sonic anemometer measurements from a tethered balloon and high frequency pressure variation observations from a research aircraft, both flown in proximity to stationary, ground-based radars. Modest biases are found among the data sets in particularly low- or high-turbulence regimes, but in general the radar-retrieved values correspond well with the in situ measurements. Root mean square differences are typically a factor of 4–6 relative to any given magnitude of dissipation rate. These differences are no larger than those found when comparing dissipation rates computed from tethered-balloon and 15-m tower sonic measurements made at spatial distances of a few hundred meters. Moreover, radar retrievals are able to capture the vertical dissipation rate structure observed by the in situ sensors, while offering substantially more information on the time variability of turbulence profiles. Together these evaluations indicate that radar-based retrievals can, at a minimum, be used to determine the vertical structure of turbulence in Arctic stratocumulus clouds.

Turbulent Dissipation-Rate Equation for Compressible Flows

AIAA Journal ◽  
2003 ◽  
Vol 41 (6) ◽  
pp. 1017-1021 ◽  
Author(s):  
Krishnendu Sinha ◽  
Graham V. Candler
Keyword(s):  
Rate Equation ◽  
Dissipation Rate ◽  
Compressible Flows ◽  
Turbulent Dissipation ◽  
Turbulent Dissipation Rate
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