✦ LIBER ✦

Experimental study of vorticity filaments in a turbulent swirling flow

✍ Scribed by B. Dernoncourt; J.-F. Pinton; S. Fauve

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 744 KB
Volume: 117
Category: Article
ISSN: 0167-2789
DOI: 10.1016/s0167-2789(97)00309-6

No coin nor oath required. For personal study only.

✦ Synopsis

We study vorticity fluctuations in a turbulent von K~rm~n swirling flow generated in the gap between coaxial contrarotating disks. The flow is probed acoustically by an ultrasonic incident wave and the scattered pressure reveals intense vorticity concentrations which occur intermittently in the bulk of the flow. They are compatible with low pressure tube-like structures visualized in the same flow [Douady et al., Phys. Rev. Lett. 67 (1991) 983-986] and quantified with pressure measurements [Fauve et al., J. Phys. II (France) 3 (1993) 271-278]. Their core size scales like the Taylor microscale as the Reynolds number is varied. Their statistical properties are analyzed in details and are found to be similar to those of pressure fluctuations.

📜 SIMILAR VOLUMES

An experimental and numerical study of t

An experimental and numerical study of turbulent swirling flow in gas cyclones

✍ A.J. Hoekstra; J.J. Derksen; H.E.A. Van Den Akker 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 339 KB

Experimental results on the turbulent, strongly swirling #ow "eld in a reverse #ow gas cyclone separator are presented, and used to evaluate the performance of three turbulence closure models. Mean and #uctuating velocity components were measured for gas cyclones with di!erent geometric swirl number

Experimental and theoretical study of pa

Experimental and theoretical study of particle dispersion in a swirling, particle-laden, reacting turbulent flow

✍ J.S. Shirolkar; M. Queiroz 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 116 KB

Numerical and experimental study of swir

Numerical and experimental study of swirling flow in a model combustor

✍ J.L. Xia; G. Yadigaroglu; Y.S. Liu; J. Schmidli; B.L. Smith 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 989 KB

The present paper describes a numerical and experimental investigation of strongly swirling flow in a water model combustion chamber equipped with a swirler of special design. The turbulence models used for the numerical calculations are the standard k-e model, the RNG k-e model and a differential R

Large eddy simulations of turbulent swir

Large eddy simulations of turbulent swirling flows in a dump combustor: a sensitivity study

✍ P. Wang; X. S. Bai 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 625 KB

Experimental studies of spray evaporatio

Experimental studies of spray evaporation in turbulent flow

✍ M. Sommerfeld; H.-H. Qiu 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 745 KB

A number of processes in the chemical industry and in combustion science involve the evaporation of atomised liquids in a turbulent environment. To allow an optimisation of such processes and to provide data for the validation of numerical calculations, the spray evaporation in a heated turbulent ai

DNS, experimental and modelling study of

DNS, experimental and modelling study of axially compressed in-cylinder swirling flow

✍ S. Jakirlić; J. Volkert; H. Pascal; K. Hanjalić; C. Tropea 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 870 KB

The paper reports on recent progress in the investigation and modelling of joint eects of compression and swirl on turbulence in a cylinder of a single-stroke rapid compression machine (RCM). Experimental and modelling investigations cover a ¯at cylinder geometry and a `squish' con®guration with a b