Download or read book Numerical Simulation of Low Reynolds Number Pipe Orifice Flow written by Chunjian Ni and published by . This book was released on 2003 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulation methods for axisymmetric laminar pipe and orifice flow by the primitive variable approach and the stream function vorticity approach were introduced in this thesis. These numerical simulation methods were validated by comparing the simulation results for axisymmetric laminar pipe flow with corresponding analytical solutions. Numerical simulations were carried out to simulate low Reynolds number flow through orifices with orifice/pipe diameter ratios of 0.5 and 0.2 by both approaches. The simulation results matched the experimental and numerical simulation results provided by other researchers. Numerical simulations for low Reynolds number flow through an orifice with a very small orifice/pipe diameter ratio (diameter ratio of 0.0445) were carried out by FLUENT and the stream function vorticity approach. The numerical simulation results at low orifice Reynolds numbers were compared with the theoretical prediction given by Dagan et al. and the experimental results obtained by other Iowa State University (ISU) investigators. It was found that the simulation results by both FLUENT and the stream function vorticity approach were consistent with the theoretical prediction at low orifice Reynolds numbers, and the ISU experimental results were much lower than the numerical simulation results. A simple non-Newtonian modeling was used in FLUENT to simulate the low orifice Reynolds number flow through the orifice with the diameter ratio of 0.0445. The non-Newtonian results were closer to the ISU experimental results compared to the Newtonian results.

Download or read book Direct Numerical Simulation of Incompressible Pipe Flow Using a B spline Spectral Method written by Patrick Loulou and published by . This book was released on 1996 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book RANS Numerical Simulation of Turbulent Particulate Pipe Flow for Fixed Reynolds Number written by Alexander Kartushinsky and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: RANS Numerical Simulation of Turbulent Particulate Pipe Flow for Fixed Reynolds Number.

Download or read book Elliptic Flow Computation by Low Reynolds Number Two equation Turbulence Models written by V. Michelassi and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Simulation of Low Reynolds Number Slip Flow Past a Confined Microsphere written by R. W. Barber and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Simulation of Two Flow Control Approaches for Low Reynolds Number Applications written by Daniel A. Reasor and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurements with Particle Image Velocimetry on Fully Developed Turbulent Pipe Flow at Low Reynolds Number written by J. Westerweel and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements with particle image velocimetry were carried out in fully developed turbulent pipe flow at a Reynolds number of 5,277. Data were obtained in a plane through the centerline of the pipe, across the full diameter. Statistical properties of the flow obtained by ensemble averaging of the data along the axial direction were in good agreement with direct numerical simulation. Maps of instantaneous tangential vorticity reveal spatial structures near the pipe wall that resemble coherent flow structures predicted by direct numerical simulation. (Author).

Download or read book Numerical Simulation of Steady Two Dimensional Low Reynolds Number Rimming Flow with Free Surface written by Jiong Shen and published by . This book was released on 1992 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Numerical Simulation of Incompressible Pipe Flow Using a B Spline Spectral Method written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical method based on b-spline polynomials was developed to study incompressible flows in cylindrical geometries. A b-spline method has the advantages of possessing spectral accuracy and the flexibility of standard finite element methods. Using this method it was possible to ensure regularity of the solution near the origin, i.e. smoothness and boundedness. Because b-splines have compact support, it is also possible to remove b-splines near the center to alleviate the constraint placed on the time step by an overly fine grid. Using the natural periodicity in the azimuthal direction and approximating the streamwise direction as periodic, so-called time evolving flow, greatly reduced the cost and complexity of the computations. A direct numerical simulation of pipe flow was carried out using the method described above at a Reynolds number of 5600 based on diameter and bulk velocity. General knowledge of pipe flow and the availability of experimental measurements make pipe flow the ideal test case with which to validate the numerical method. Results indicated that high flatness levels of the radial component of velocity in the near wall region are physical; regions of high radial velocity were detected and appear to be related to high speed streaks in the boundary layer. Budgets of Reynolds stress transport equations showed close similarity with those of channel flow. However contrary to channel flow, the log layer of pipe flow is not homogeneous for the present Reynolds number. A topological method based on a classification of the invariants of the velocity gradient tensor was used. Plotting iso-surfaces of the discriminant of the invariants proved to be a good method for identifying vortical eddies in the flow field. Loulou, Patrick and Moser, Robert D. and Mansour, Nagi N. and Cantwell, Brian J. Ames Research Center DIGITAL SIMULATION; COMPUTERIZED SIMULATION; COMPUTATIONAL FLUID DYNAMICS; INCOMPRESSIBLE FLOW; PIPE FLOW; FINITE ELEMENT METHOD; TURBULENT FLOW; ...

Download or read book Fully Developed Turbulent Pipe Flow written by Junichi Takeuchi and published by . This book was released on 2006 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Orifice Plates and Venturi Tubes written by Michael Reader-Harris and published by Springer. This book was released on 2015-04-29 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives the background to differential-pressure flow measurement and goes through the requirements explaining the reason for them. For those who want to use an orifice plate or a Venturi tube the standard ISO 5167 and its associated Technical Reports give the instructions required. However, they rarely tell the users why they should follow certain instructions. This book helps users of the ISO standards for orifice plates and Venturi tubes to understand the reasons why the standards are as they are, to apply them effectively, and to understand the consequences of deviations from the standards.

Download or read book Direct Numerical Simulation of Turbulent Flow in a Circular Pipe Subjected to Radial System Rotation written by Zhao-Ping Zhang and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, direct numerical simulations have been preformed with a high-order spectral element method computer code to investigate the Coriolis force effect on a fully-developed turbulent flow confined within a circular pipe subjected to radial system rotations. In order to study the radially rotating effects on the flow, a wide range of rotation numbers have been tested. In response to the system rotation imposed, large-scale secondary flows appear as streamwise counter-rotating vortices, which highly interact with the boundary layer and have a significant impact on the turbulent flow structures and dynamics. A quasi Taylor-Proudman region occurs at low rotation numbers, where the mean axial velocity is invariant along the rotating axis. As the rotation number increases, laminarization occurs near the bottom wall of the pipe, and the flow become fully laminarized when the rotation number approaches one. The characteristics of the flow field are investigated in both physical and spectral spaces, which include the analyses of the first- and second-order statistical moments, pre-multiplied spectra of velocity fluctuations, budget balance of the transport equation of Reynolds stresses, and coherent flow structures.

Download or read book Applied Hydraulic Transients written by M. Hanif Chaudhry and published by Van Nostrand Reinhold Company. This book was released on 1987 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Simulation Studies of Unsteady Low Reynolds Number Separated Flows written by Mahidhar Tatineni and published by . This book was released on 2002 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamentals Of Turbulence Modelling written by Ching Jen Chen and published by CRC Press. This book was released on 1997-12-01 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on the second-order turbulence-closure model and its applications to engineering problems. Topics include turbulent motion and the averaging process, near-wall turbulence, applications of turbulence models, and turbulent buoyant flows.

Download or read book Essential Equations for Anaesthesia written by Edward T. Gilbert-Kawai and published by Cambridge University Press. This book was released on 2014-05-08 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers all of the equations that candidates need to understand and be able to apply when sitting postgraduate anaesthetic examinations.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: