Concentration and velocity field measurements in turbulent flows using laser-induced fluorescence tomography (LIFT)

1996 ◽  
Vol 56 (2-3) ◽  
pp. 181-190 ◽  
Author(s):  
Gerhard J. Merkel ◽  
Paul Rys ◽  
Franz S. Rys ◽  
Themistocles A. Dracos
Keyword(s):  
Velocity Field ◽  
Turbulent Flows ◽  
Field Measurements ◽  
Laser Induced Fluorescence ◽  
Fluorescence Tomography

Laser-induced fluorescence technique for velocity field measurements in subsonic gas flows

1983 ◽  
Vol 8 (9) ◽  
pp. 474 ◽  
Author(s):  
B. Hiller ◽  
J. C. McDaniel ◽  
E. C. Rea ◽  
R. K. Hanson
Keyword(s):  
Velocity Field ◽  
Field Measurements ◽  
Laser Induced Fluorescence ◽  
Gas Flows ◽  
Fluorescence Technique

Simultaneous 3D temperature and velocity field measurements of micro-flow with laser-induced fluorescence and micro-digital holographic particle tracking velocimetry: Numerical study

2015 ◽  
Vol 13 (7) ◽  
pp. 072801-72805
Author(s):  
Longchao Yao Longchao Yao ◽  
Xuecheng Wu Xuecheng Wu ◽  
Jing Yang Jing Yang ◽  
Yingchun Wu Yingchun Wu ◽  
Xiang Gao Xiang Gao ◽  
...  
Keyword(s):  
Velocity Field ◽  
Particle Tracking ◽  
Particle Tracking Velocimetry ◽  
Numerical Study ◽  
Field Measurements ◽  
Laser Induced Fluorescence ◽  
Micro Flow

Comments on the reconnexion rate of magnetic fields

1973 ◽  
Vol 9 (1) ◽  
pp. 49-63 ◽  
Author(s):  
E. N. Parker
Keyword(s):  
Velocity Field ◽  
Magnetic Fields ◽  
Turbulent Flows ◽  
Similarity Solutions ◽  
Neutral Point ◽  
Solar Photosphere ◽  
Complete Field ◽  
Fluid Equations ◽  
The Galaxy

The reconnexion rate of magnetic fields is crucial in understanding the fields found in turbulent flows in the solar photosphere and in the galaxy, and in flare phenomena. This paper examines the behaviour of magnetic fields in the neighbourhood of an X-type neutral point. The treatment is kinematical, specifying the velocity field v and constructing solutions to the hydromagnetic equation for B. The calculations demonstrate that the reconnexion rate is controlled by the diffusion in the near neighbourhood of the neutral point, and is not arbitrarily large, as has been suggested by similarity solutions of the complete field and fluid equations for vanishing diffusion

Assessment of Certainty of Ventilation Processes Mathematical Modeling

2015 ◽  
Vol 725-726 ◽  
pp. 1255-1260
Author(s):  
Tamara Daciuk ◽  
Vera Ulyasheva
Keyword(s):  
Mathematical Modeling ◽  
Turbulent Flows ◽  
Turbulence Models ◽  
Field Measurements ◽  
Heat Emission ◽  
Emission Sources ◽  
Wide Range ◽  
Calculation Results ◽  
Definition Of ◽  
Semiempirical Models

Numerical experiment has been successfully used during recent 10-15 years to solve a wide range of thermal and hydrogasodynamic tasks. Application of mathematical modeling used to design the ventilation systems for production premises characterized by heat emission may be considered to be an effective method to obtain reasonable solutions. Results of calculation performed with numerical solution of ventilation tasks depend on turbulence model selection. Currently a large number of different turbulence models used to calculate turbulent flows are known. Testing and definition of applicability limits for semiempirical models of turbulence should be considered to be a preliminary stage of calculation. This article presents results of test calculations pertaining to thermal air process modeling in premises characterized by presence of heat emission sources performed with employment of different models of turbulence. Besides, analysis of calculation results and comparison with field measurements data are presented.

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