Experimental Investigations of Flow and Mixing in Taylor-Couette Reactor using PIV and LIF Methods

Racina, Anna; Požarnik, Matej; Kind, Matthias

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Naslov:	Experimental Investigations of Flow and Mixing in Taylor-Couette Reactor using PIV and LIF Methods
Avtorji:	ID Racina, Anna (Avtor) ID Požarnik, Matej (Avtor) ID Kind, Matthias (Avtor)
Datoteke:	http://www.ripublication.com/ijdfvol1.htm
Jezik:	Angleški jezik
Vrsta gradiva:	Neznano
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	FS - Fakulteta za strojništvo
Opis:	Modern laser-optical methods (Particle Image Velocimetry and Laser Induced Fluorescence) for flow characterization are implemented to study the mixing behavior in Taylor-Couette Reactor without axial flow. In this study, cylinders with a radius-ratio equal to 0.63 are taken into account, which results in a direct transition from laminar fluid flow regime to a turbulent one. During PIV measurements special attention is paid to the system settings at which the error vector fraction is minimized. Energy dissipation rate and the distribution of local micromixing times are calculated from PN data. The average dissipation rate has values in the order of magnitude of 1▫$^{-3}$▫- 1▫$0^{-1}$▫ W/kg depending on the rotation rate of inner cylinder. The corresponding micromixing times are from 50 down to 5 ms. For LIF experiments the calibration procedure and the image processing sequence are presented. LIF data are used to study macro- and mesomixing. Macromixing in axial direction is approximated using a one-parameter model of mixing (cascade of stirred vessels). The value of diffusion coefficient (3 1▫$0^{-5}$▫) m2/s) agrees well with values published in literature. The methodology of determining the segregation index and the local mesomixing times in the flow is introduced, followed by the presentation of selected results.
Ključne besede:	fluid mechanics, mixing, laser induced flourescence method
Leto izida:	2005
PID:	20.500.12556/DKUM-27059
UDK:	532.5:519.61/.64
COBISS.SI-ID:	9877270
ISSN pri članku:	Y505-3455
NUK URN:	URN:SI:UM:DK:4SLSOCRJ
Datum objave v DKUM:	01.06.2012
Število ogledov:	1992
Število prenosov:	69
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Področja:	Ostalo
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Gradivo je del revije

Naslov:	International journal of dynamics of fluids
Skrajšan naslov:	Int. j. dyn. fluids
Založnik:	Research India Publications
ISSN:	0973-1784
COBISS.SI-ID:	9875734

Sekundarni jezik

Jezik:	Angleški jezik
Ključne besede:	mehanika tekočin, mešanje, gibanje delcev, lasersko inducirana fluorescenčna metoda, delci

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