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Sunday, July 19, 2020 | History

5 edition of Measurement of Turbulent Scalar Mixing by Means of a Combination of Piv & Lif found in the catalog.

Measurement of Turbulent Scalar Mixing by Means of a Combination of Piv & Lif

by Lourens Aanen

  • 123 Want to read
  • 37 Currently reading

Published by Delft Univ Pr .
Written in English

    Subjects:
  • Physics,
  • Science,
  • Science/Mathematics

  • The Physical Object
    FormatPaperback
    Number of Pages157
    ID Numbers
    Open LibraryOL12803709M
    ISBN 109040723516
    ISBN 109789040723513

    a combination technique between PIV and LIF was developed by using two sets of high-speed cameras to measure the instantaneous velocity and instantaneous concentration field simultaneously. Of particular significance is that that the synchro-nicity allows the direct computation of scalar flux and velocity. Consequently, effects of coherent.   Presently, a combination of planar LIF (Crimaldi ) and planar PIV can probably be regarded as the 'state of the art technique' for measurements in stratified environments (e.g. Westerweel et al , Chen et al , Xu and Chen ). Yet, flow dynamics, especially in the presence of turbulence, are inherently three-dimensional and.

    a turbulent annular mixing layer. Part 2. Mixing of a passive scalar By JONATHAN B. FREUNDy, PARVIZ MOIN AND SANJIVA K. LELE Center for Turbulence Research, Stanford University, Stanford, CA , USA (Received 11 November and in revised form 21 March ) The mixing of fuel and oxidizer in a mixing layer between high-speed streams is. Turbulent scalar mixing in the near field of a tee mixer (transverse jet in a pipe) is studied using Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF). Two jet-to-pipe velocity ratios, r = and r = , are investigated for a turbulent pipe flow at a Reynolds number of 20, The laser measurement techniques.

    Experimental Study on Passive Scalar Diffusion in a Round Counter Jet by a Combined PIV and PLIF Measurements H. Tsunoda1 1Department of Mechanical Systems Engineering University of Yamanashi, Takeda , Kofu , Japan Abstract Simultaneous measurements on . Dissertation: Measurement of turbulent scalar mixing by means of a combination of PIV and LIF Mathematics Subject Classification: 76—Fluid mechanics Advisor 1: Jerry Westerweel.


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Measurement of Turbulent Scalar Mixing by Means of a Combination of Piv & Lif by Lourens Aanen Download PDF EPUB FB2

Buy Measurement of turbulent scalar mixing by means of a combination of PIV and LIF on FREE SHIPPING on qualified ordersCited by: 4. Measurement of turbulent scalar mixing by means of a (). Pagina-navigatie: Main; Save publication. Save as MODS; Export to Mendeley; Save as EndNote; Export to RefWorks; Title: Measurement of turbulent scalar mixing by means of a combination of PIV and LIF: Author: Aanen, L.

Thesis advisor: Westerweel, J., Nieuwstadt, F.T.M. Date issued Cited by: 4. Measurement of turbulent scalar mixing by means of a combination of PIV and LIF. By L. (author) Topics: PIV, LIF, mixing. Publisher: Delft University Press. Year: OAI identifier: oai Author: L. (author) Aanen.

Aanen, L., Measurement of turbulent scalar mixing by means of a combination of PIV and LIF, Ph.D. Thesis, Delft University of Technology, Google ScholarAuthor: J.

de Hoogh, M. Veenman, J. Kuerten. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link); http://oai Author: L. Aanen. In order to gain a better understanding of the mixing process, simultaneous measurements of velocities and concentrations would be helpful.

Therefore experiments were carried out by means of simultaneous PIV and LIF measurements on the mixing of a point source placed at the centreline of a turbulent pipe : L.

Aanen, Jerry Westerweel. Simultaneous measurements of velocity and passive scalar concentration fields have been conducted by using Particle Image Velocimetry (planar 2C and 3C PIV) and Planar Laser Induced Fluorescence (PLIF) techniques.

The mixing injection behavior is analyzed for several injection values of depth and flow by: measurement from PIV/LIF the deflecting angle of the jet is nea rly the same as it was defined from free jet.

So, this 3D structure is probably not a ssociated with a default from the line injection. For example, Fig. 6 shows some data comparisons of mean streamwise velocity U (y) and the Reynolds stress between LDA and PIV measurements in vegetated canopy open-channel flows.

h is the height of vegetation elements (rigid strip plate, h = 50 mm height, w = 8 Cited by: Turbulent mixing and scalar transport One of the goals of investigations of scalar elds is to provide an insight into the mixing process. Dimotakis () reviewed various levels of scalar mixing.

Passive scalar mixing is the rst level which does not a ect the ow dynamics. In other cases, the dynamics of theFile Size: 6MB. A finer characterization of the turbulent flow and of the scalar concentration fluctuations, by the simultaneous PIV and PLIF measurements, is performed on a portion of plane P2 close to the feed from inlet #2.

As a difference with plane P1, on P2 the laser light does not to meet the shaftFile Size: 3MB. In the present paper, mixing of a passive scalar in a self-preserving axisymmetric turbulent jet at a Reynolds number of 2× is studied utilizing combined particle image velocimetry (PIV) and.

LIF measurements of scalar mixing in turbulent shear layers By P. Karasso 1 AND M. Mungal I 1. Motivation and objectives The structure of shear layer flows at high Reynolds numbers remains a very interesting problem.

Straight mixing layers have been studied (Brown & Roshko. measurements Our planar Laser Induced Fluorescence (LIF) systems for diagnostics of mixing and scalar transport in liquids are specially designed to handle whole-field concentration or temperature measurements which can be synchronized with simultaneous velocity measurements if desired.

Simultaneous measurements of velocity and passive scalar concentration fields have been conducted by using Particle Image Velocimetry (planar 2C and 3C PIV) and Planar Laser Induced Fluorescence (PLIF) techniques. The mixing injection behavior is analyzed Cited by: For the modeling of the scalar dissipation rate, large-eddy simulations have the advantage of resolv- ing the major part of the turbulent motion.

Only the fluctuations which occur on smaller length scales than the filter width, typically given by the spacing of the numerical discretization, have to be modeled.

In the present paper, mixing of a passive scalar in a self-preserving axisymmetric turbulent jet at a Reynolds number of 2 × is studied utilizing combined particle image velocimetry (PIV) and planar laser induced fluorescence (LIF).

Detailed measurements are made for the mean velocity, turbulent intensity of velocity fluctuation, Reynolds shear stress, mean concentration, concentration fluctuation. Analysis of a Turbulent Jet Mixing Flow by Using a PIV-PLIF Combined System 36 3.

Image Processing PIV Image Processing Most common used methods for PIV image processing can be categorized into two groups: particle tracking methods and spatial correlation analysis methods (including auto-correlation methods and cross-correlation methods). Experimental study of turbulent mixing in a tee mixer using PIV and PLIF 1 January | AIChE Journal, Vol.

47, No. 12 Numerical investigation of the scalar probability density function distribution in neutral and stably stratified mixing layersCited by: ABSTRACT A method for the simultaneous measurements of velocity and passive scalar concentration fields by means of Particle Image Velocimetry (PIV) and Planar Laser Induced Florescence (PLIF) techniques will be described in the present paper.

The combination of planar Particle Image Velocimetry (PIV) and Laser Induced Fluorescence (LIF) was used to measure the turbulent velocity and concentration fields as well as to determine the correlations of the Reynolds stress tensor u i ′ u j ′ and the Reynolds flux vector u i ′ c ′.

Boundary conditions were determined using Laser Author: Flavio Cesar Cunha Galeazzo, Georg Donnert, Peter Habisreuther, Nikolaos Zarzalis, Richard J. Valdes.The combination of PIV and LIF is used to simultaneously measure the instantaneous concentration and velocity fields in the impinging jets, which provides the estimates of the turbulent mass transport term in the plane.

These information enables one to compare directly the validity of different models for the turbulent : Investigation of turbulent flow by means of the PIV method cker, A. Bölcs Instantaneous flow field measurements by means of the PIV method can be employed for the reduction of mean velocities and turbulence quantities.

The present paper describes the setup of a test rig and a PIV system for the study with a combination of.