Dispersion and Deposition of Particles in a Turbulent Pipe Flow with and Without Sudden Expansion
Author: Qian Chen
Publisher:
Published: 1994
Total Pages: 194
ISBN-13:
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Author: Qian Chen
Publisher:
Published: 1994
Total Pages: 194
ISBN-13:
DOWNLOAD EBOOKAuthor: Jean-Pierre Minier
Publisher: Springer
Published: 2016-07-26
Total Pages: 268
ISBN-13: 3319415670
DOWNLOAD EBOOKThe book presents an up-to-date review of turbulent two-phase flows with the dispersed phase, with an emphasis on the dynamics in the near-wall region. New insights to the flow physics are provided by direct numerical simuation and by fine experimental techniques. Also included are models of particle dynamics in wall-bounded turbulent flows, and a description of particle surface interactions including muti-layer deposition and re-suspension.
Author: Bennie Mols
Publisher:
Published: 1995
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Gylfi Arnason
Publisher:
Published: 1982
Total Pages: 276
ISBN-13:
DOWNLOAD EBOOKAuthor: Chunyu Jin
Publisher:
Published: 2012
Total Pages: 244
ISBN-13:
DOWNLOAD EBOOKAuthor: Bernard Marie Mols
Publisher:
Published: 1999
Total Pages: 160
ISBN-13: 9789040718335
DOWNLOAD EBOOKAuthor: Egon Matijevic
Publisher: Springer Science & Business Media
Published: 2008-12-05
Total Pages: 323
ISBN-13: 0387769218
DOWNLOAD EBOOKThe important role of ?nely dispersed matter and surfaces in medicine is not always fully understood and appreciated. Speci?cally, ?ne particles (solid or liquid) in the size range of several nanometers to several micrometers have a tremendous effect on our lives, because they can be bene?cial or detrimental to our well-being. Such particles are present in living bodies as red blood cells or cholesterol crystals in the gall bladder. They are ubiquitous in the environment, where they can cause many diseases, such as asbestosis, silicosis, and black lung disease, but they are also used in diagnostic tests, drug delivery, and numerous other applications. More recently, evidence has become available that drug formulations with active components in a ?nely dispersed state may signi?cantly affect their functionality. Furthermore, with miniaturization of medical instrumentation, the size of the components is necess- ily reduced to colloid or even smaller range. This volume is a collection of several chapters dealing with diverse topics of colloids and surfaces relevant to medical applications. Thus, Siiman describes the use of optical properties of uniform colloidal particles as probes in ?ow cytometry. Giesche focuses on the preparations and properties of exceedingly uniform silica spheres for different uses, such as in chromatography. In modi?ed forms, silica p- ticles with incorporated dyes are employed in diagnostics and those combined with tiny magnetic entities in drug delivery.
Author: Jonathan Frederick William Adams
Publisher:
Published: 2011
Total Pages: 558
ISBN-13:
DOWNLOAD EBOOKThis study is concerned with the modelling of single-phase and two-phase turbulent flows in a square duct over a range of Reynolds numbers with attention focused on the deposition, dispersion and re-suspension of particles. Reynolds averaged Navier Stokes (RANS) modelling is used in conjunction with a Lagrangian particle tracker (LPT). Modelling and simulation of single- and two-phase turbulent flows in circular pipes with the presences of stationary flat beds are also considered using the previously stated methodologies, as well as large eddy simulation (LES). The performance of the RANS modelling technique is evaluated against available experimental, simulation and empirical data. The RANS modelling technique is seen to perform with qualitative accuracy across all of the test cases considered within this thesis, and it can be said that this approach is capable of reproducing many of the key feature' associated with these flows. In almost all cases, qualitative agreement is seen between the RANS modelling results and the available experimental data, simulation results and empirical correlations. A key failing of the RANS modelling technique is the inaccurate representation of the magnitude of the secondary velocities found in square ducts and pipes with variable bed height. The RANS modelling technique with a Reynolds stress model (RSM) for turbulence, coupled with a LPT, can be usefully used in modelling particle-laden duct and pipe flow. across a range of conditions. Important qualitative information can be gained from this technique in terms of particle deposition, dispersion and re-suspension. For more detailed studies on the physics of these flows, the preferred methodologies are the more advanced simulation techniques of LES and direct numerical simulation CDNS), while there is also a clear need for further experimental investigations of such particle- laden flows.
Author: Timothy Akingbola Ilori
Publisher:
Published: 1971
Total Pages: 256
ISBN-13:
DOWNLOAD EBOOKAuthor: Leonid I. Zaichik
Publisher: John Wiley & Sons
Published: 2008-12-04
Total Pages: 318
ISBN-13: 3527626263
DOWNLOAD EBOOKThe only work available to treat the theory of turbulent flow with suspended particles, this book also includes a section on simulation methods, comparing the model results obtained with the PDF method to those obtained with other techniques, such as DNS, LES and RANS. Written by experienced scientists with background in oil and gas processing, this book is applicable to a wide range of industries -- from the petrol industry and industrial chemistry to food and water processing.