Distribution of turbulence energy dissipation rates in a Rushton turbine stirred mixer

1989 ◽  
Vol 8 (3-4) ◽  
pp. 153-160 ◽  
Author(s):  
H. Wu ◽  
G. K. Patterson ◽  
M. Van Doorn
Keyword(s):  
Energy Dissipation ◽  
Turbulence Energy ◽  
Rushton Turbine ◽  
Dissipation Rates ◽  
Turbulence Energy Dissipation

scholarly journals Energy Dissipation Rates of Turbulence with an Airborne Microwave Refractometer

1991 ◽  
Vol 44 (4) ◽  
pp. 435
Author(s):  
SBSS Sarma
Keyword(s):  
Refractive Index ◽  
Energy Dissipation ◽  
Vertical Gradient ◽  
Turbulence Energy ◽  
Turbulence Structure ◽  
Free Atmosphere ◽  
Dissipation Rates ◽  
Turbulence Energy Dissipation ◽  
Wind Shears ◽  
Time Basis

Estimates of turbulence energy dissipation rates have been obtained in the free atmosphere of the planetary boundary layer. These are derived in terms of the variance of radio refractive index fluctuations {Lln2 }, the Brunt-Vaisala frequency N, the mean vertical gradient of generalised potential refractive index M, and the turbulence structure parameter C~, using an airborne microwave refractometer. The energy dissipation rates thus derived are comparable with the results from other experiments. The inferred energy dissipation rates (on a near real-time basis) from the airborne microwave refractometer. are useful for detection and warning of wind shears in the atmosphere.

Sensitizing the Dissipation Equation to Irrotational Strains

1980 ◽  
Vol 102 (1) ◽  
pp. 34-40 ◽  
Author(s):  
K. Hanjalic´ ◽  
B. E. Launder
Keyword(s):  
Energy Transfer ◽  
Energy Dissipation ◽  
Boundary Layers ◽  
Dissipation Rate ◽  
Energy Dissipation Rate ◽  
Turbulent Boundary Layers ◽  
Turbulence Energy ◽  
Turbulence Energy Dissipation ◽  
Dissipation Equation

The paper recommends the addition of an extra term to the conventional approximate transport equation for the turbulence energy dissipation rate. The term may be interpreted as emphasizing the role of irrotational deformations in promoting energy transfer across the spectrum or, equivalently, of augmenting the influence of normal strains. Calculations, including the new term, are reported for the plane and round jet, and for several turbulent boundary layers. In the cases considered the addition of the new term significantly improves agreement with experiment.

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