Particle–fluid interactions in grid-generated turbulence
نویسندگان
چکیده
منابع مشابه
Quantum Turbulence Generated by Grid Motion in Superfluid He
The mechanism by which the quantized vortex tangle in a turbulent superfluid system decays remains little understood [1]. Research into the subject suggests that Kelvin waves play an integral part in the dissipation process [2]. To generate quantum turbulence, a grid is dragged through 4 He which has condensed into the superfluid state. Oscillations in the motion of this grid remain a problem, ...
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A grid of bars towed through a sample of He II produces both superfluid turbulence and classical hydrodynamic turbulence. The two velocity fields-in the normal fluid and in the superfluid-have been observed to have the same energy spectral density over a large range of scales. Here, we introduce a characteristic scale l(q)=2 pi(epsilon/kappa(3))(-1/4), where epsilon is the rate of turbulent ene...
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متن کاملExperimental Investigation of Statistical Moments of Travel Time in Grid-generated Turbulence
An experimental technique for investigation of the behavior of acoustic wave propagation through a turbulent medium is discussed. The present study utilizes the ultrasonic travel-time technique to diagnose a grid-generated turbulence. The statistics of the travel-time variations of ultrasonic wave propagation along a path are used to determine some metrics of the turbulence. Experimental data o...
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ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 2007
ISSN: 0022-1120,1469-7645
DOI: 10.1017/s0022112007007793