Book ChapterDOI
Numerical computations of the flow in curved ducts.
V. S. Pratap,D. B. Spalding +1 more
TLDR
In this paper, the authors describe the application of a recently developed numerical scheme to the computation of the flow in a curved duct, which is partially-parabolic in nature as there are significant elliptic effects, which are transmitted through the pressure field.Abstract:
The paper describes the application of a recently developed numerical scheme to the computation of the flow in a curved duct. The flow situation is partially-parabolic in nature as there are significant elliptic effects, which are transmitted through the pressure field. The turbulence model used comprises two differential equations, one for the kinetic energy of turbulence and the other for its dissipation rate. It has been observed that the predictions using the new procedure agree very satisfactorily with the experimental data. Comparisons are also made with the predictions of a fully-parabolic calculation procedure.read more
Citations
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Journal ArticleDOI
Turbulence models and their applications to the prediction of internal flows: a review
TL;DR: In this paper, a brief account of various turbulence models employed in the computation of turbulent flows, and evaluation of the application of these models to selected internal flow configurations is presented. But, the main conclusions of this analysis are: (1) the k-epsilon model is used in a majority of all the two-dimensional flow calculations reported in the literature; (2) modified forms of the K-Epsilon model improve the performance for flows with streamline curvature and heat transfer; (3) for flow with swirl, the algebraic stress model performs rather
Journal ArticleDOI
Laminar flow in a square duct of strong curvature
TL;DR: In this paper, the authors used laser-Doppler anemometry to quantify the velocity field of water in a 90° bend of 40 x 40mm cross-section; the bend had a mean radius of 92mm and was located downstream of a 1[sdot ]8m and upstream of a 2m straight section.
Journal ArticleDOI
The mathematical modelling of turbulent flows
TL;DR: A review of the problems and successes of computing turbulent flow can be found in this article, with a summary of the advantages and disadvantages of the various turbulence models, in an attempt to assist the potential user in choosing the most suitable model for his particular problem.
Journal ArticleDOI
Turbulent flow in a square duct with strong curvature
TL;DR: In this article, the steady, incompressible, isothermal, developing flow in a square-section curved duct with smooth walls was investigated, and the mean velocity and Reynolds tensor were measured with a laser-Doppler anemometer at a Reynolds number of 4 × 104 and in various cross-stream planes.
Journal ArticleDOI
Computation of the flow in shallow river bends
J.P.T. Kalkwijk,H.J. De Vriend +1 more
TL;DR: In this paper, the authors presented a mathematical model of the flow in rivers of which: i the depth is small compared with the width, ii the width is small with the radius of curvature, iii the horizontal length scale of the bottom variations is of the order of magnitude of the width.
References
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Journal ArticleDOI
The numerical computation of turbulent flows
Brian Launder,D. B. Spalding +1 more
TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
Journal ArticleDOI
A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows
S.V. Patankar,D. B. Spalding +1 more
TL;DR: In this article, a general, numerical, marching procedure is presented for the calculation of the transport processes in three-dimensional flows characterised by the presence of one coordinate in which physical influences are exerted in only one direction.
Mathematical Models of turbulence
Brian Launder,D. B. Spalding +1 more
TL;DR: In this article, turbulence and melange models are used to model models of mathematical models for fluides reference record created on 2005-11-18, modified on 2016-08-08.
Journal ArticleDOI
Prediction of laminar flow and heat transfer in helically coiled pipes
TL;DR: In this paper, a calculation procedure for three-dimensional parabolic flows is applied to predict the velocity and temperature fields in helically coiled pipes, where the curvature produces a secondary flow and causes departures from the symmetric velocity profile of Poiseuille flow.
Journal ArticleDOI
Prediction of turbulent flow in curved pipes
TL;DR: In this article, a finite-difference procedure is employed to predict the development of turbulent flow in curved pipes, which involves the solution of two differential equations, one for the kinetic energy of the turbulence and the other for its dissipation rate.
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A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows
S.V. Patankar,D. B. Spalding +1 more