Journal ArticleDOI
The plane Symmetric sudden-expansion flow at low Reynolds numbers
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TLDR
In this article, velocity measurements and numerical predictions are presented for the flow through a plane nominally two-dimensional duct with a Symmetric sudden expansion of area ratio 1:2.Abstract:
Detailed velocity measurements and numerical predictions are presented for the flow through a plane nominally two-dimensional duct with a Symmetric sudden expansion of area ratio 1:2. Both the experiments and the predictions confirm a symmetry-breaking bifurcation of the flow leading to one long and one short Separation zone for channel Reynolds numbers above 125, based on the upstream channel height and the maximum flow velocity upstream. With increasing Reynolds numbers above this value, the short separated region remains approximately constant in length whereas the long region increases in length.The experimental data were obtained using a one-component laser-Doppler anemometer at many Reynolds number values, with more extensive measurements being performed for the three Reynolds numbers 70, 300 and 610. Predictions were made using a finite volume method and an explicit quadratic Leith type of temporal discretization. In general, good agreement was found between measured and predicted velocity profiles for all Reynolds numbers investigated.read more
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Book ChapterDOI
Numerical Simulation of Turbulent Flow Through a Sudden Expansion Channel: Comparison Between Three Models
TL;DR: In this paper, the authors presented the numerical simulation of turbulent water flow through a two-dimensional sudden expansion channel for expansion ratio 3, and the governing equations have been solved by SIMPLE algorithm.
Journal Article
Transient Solution of an Incompressible Viscous Flow in a Channel with Sudden Expansion/Contraction
D. C. Dalal,Swapan K. Pandit +1 more
TL;DR: In this paper, a numerical study has been made to analyze the transient 2D flows of a viscous incompressible fluid through channels with forward or backward constriction, and the results showed that sharpness of the throat in the channel is one of the important parameters to control the strength and size of the separation zone.
Journal ArticleDOI
Low Reynolds number channelized fluid flow of asymmetric plane to a non-asymmetric plane with a sudden expansion by using lattice Boltzmann method
TL;DR: In this paper, the transition of viscous fluid flow around a square cylinder placed in a computational domain with a sudden expansion at low Reynolds numbers (Re) was investigated numerically by using the lattice Boltzmann method.
References
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Book
Numerical heat transfer and fluid flow
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Journal ArticleDOI
A stable and accurate convective modelling procedure based on quadratic upstream interpolation
TL;DR: In this paper, a convective modeling procedure is presented which avoids the stability problems of central differencing while remaining free of the inaccuracies of numerical diffusion associated with upstream differencings.
Journal ArticleDOI
Experimental and Theoretical Investigation of Backward-Facing Step Flow
TL;DR: In this paper, the velocity distribution and reattachment length of a single backward-facing step mounted in a two-dimensional channel were measured using laser-Doppler measurements.
Journal ArticleDOI
Numerical study and physical analysis of the pressure and velocity fields in the near wake of a circular cylinder
M. Braza,P. Chassaing,H. Ha Minh +2 more
TL;DR: In this paper, the authors investigated the dynamic characteristics of the pressure and velocity fields of the unsteady incompressible laminar wake behind a circular cylinder, and the initiation mechanism for vortex shedding and evaluation of the body forces are presented for Reynolds-number values of 100, 200 and 1000.