Numerical Study of Laminar and Turbulent Flows Past Two Dimensional and Axisymmetric Bodies PDF Download
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Author: Seok Ki Choi
Publisher:
ISBN:
Category : Laminar flow
Languages : en
Pages : 492
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Author: Seok Ki Choi
Publisher:
ISBN:
Category : Laminar flow
Languages : en
Pages : 492
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Book Description
Author: Ching-Jen Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 367
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Book Description
A numerical study of laminar and turbulent flows past two dimensional bodies and axisymmetric bodies is presented. Numerical methods are developed to solve Navier-Stokes equations for two dimensional and axisymmetric flows in the arbitrary geometries. The complex physical geometry is resolved by use of numerically generated, body-fitted coordinates. The governing equations are written in the transformed domain using the orthogonal velocity components as dependent variable for momentum equations. The governing equations are discretized using both the finite analytic method and the finite volume method. Both one velocity staggered grid method and two velocities staggered method are employed for grid arrangements. The velocity and pressure coupling techniques in these grid arrangements are presented. The solution procedure of the SIMPLER numerical algorithm is used with a parabolic marching technique and a global pressure calculation method. For turbulent flow calculations, both the k-epsilon turbulence model and the two-layer turbulence model are used. (KR).
Author:
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ISBN:
Category : Fluid dynamics
Languages : en
Pages : 1192
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Author:
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Category : Aeronautics
Languages : en
Pages : 702
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Author: A.V. Boiko
Publisher: Springer Science & Business Media
ISBN: 3662047659
Category : Technology & Engineering
Languages : en
Pages : 273
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The Origin of Species Charles Darwin The origin of turbulence in fluids is a long-standing problem and has been the focus of research for decades due to its great importance in a variety of engineering applications. Furthermore, the study of the origin of turbulence is part of the fundamental physical problem of turbulence description and the philosophical problem of determinism and chaos. At the end of the nineteenth century, Reynolds and Rayleigh conjectured that the reason of the transition of laminar flow to the 'sinuous' state is in stability which results in amplification of wavy disturbances and breakdown of the laminar regime. Heisenberg (1924) was the founder of linear hydrody namic stability theory. The first calculations of boundary layer stability were fulfilled in pioneer works of Tollmien (1929) and Schlichting (1932, 1933). Later Taylor (1936) hypothesized that the transition to turbulence is initi ated by free-stream oscillations inducing local separations near wall. Up to the 1940s, skepticism of the stability theory predominated, in particular due to the experimental results of Dryden (1934, 1936). Only the experiments of Schubauer and Skramstad (1948) revealed the determining role of insta bility waves in the transition. Now it is well established that the transition to turbulence in shear flows at small and moderate levels of environmental disturbances occurs through development of instability waves in the initial laminar flow. In Chapter 1 we start with the fundamentals of stability theory, employing results of the early studies and recent advances.
Author:
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Category : Weights and measures
Languages : en
Pages : 540
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Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 360
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Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 696
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1388
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 724
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