Computational Studies of Three-dimensional Transonic Shear Flow PDF Download

Author: David Anthony Oliver
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 44

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Author: J. -J. Camus
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description

Author: Michel Deville
Publisher: Springer Science & Business Media
ISBN: 3322898385
Category : Technology & Engineering
Languages : en
Pages : 406

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Book Description
Der Sammelband enthält Beiträge einer Tagung über die Simulation von dreidimensionalen Flüssigkeiten. Sie geben einen Überblick über den Stand des Wissens auf dem Gebiet der numerischen Simulation der Turbulenz, angewandt auf eine weite Spanne von Problemen wie Aerodynamik, Nicht-Newtonsche Flüssigkeiten, Konvektion.This volume contains the material presented at the IMACS-COST Conference on CFD, Three-Dimensional Complex Flows, held in Lausanne (Switzerland), September 13 - 15, 1995. It gives an overview of the current state of numerical simulation and turbulence modelling applied to a wide range of fluid flow problems such as an example aerodynamics, non-Newtonian flows, transition, thermal convection.

Author: David Anthony Oliver
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 44

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Author: Raymond E. Gordnier
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 62

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Book Description
A composite velocity procedure for the three-dimensional reduced Navier-Stokes equations is developed. In the spirit of matched asymptotic expansions, the velocity components are written as a combined multiplicative and additive composite of viscous like velocities (U, W) and pseudo-potential or inviscid velocities (phi sub x, phi sub y, phi sub z). The solution procedure is then consistent with both asymptotic inviscid flow and boundary layer theory. For transonic flow cases, the Enquist-Osher flux biasing scheme developed for the full potential equation is used. A quasi-conservation form of the governing equation is used in the shock region to capture the correct rotational behavior. This is combined with the standard nonconservation nonentropy generating form used in nonshock regions. The consistent strongly implicit procedure is coupled with plane relaxation to solve the discretized equations. The composites velocity procedure is coupled with plane relaxation to solve the discretized equations. The composits velocity procedure applied for the solution of three-dimensional afterbody problems.

Author: Mohammad A. Rahnema
Publisher:
ISBN:
Category : Cascades (Fluid dynamics)
Languages : en
Pages : 158

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Author: Roger Cohen
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 227

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Author: Fathi Habashi
Publisher: CRC Press
ISBN: 9782884490320
Category : Technology & Engineering
Languages : en
Pages : 930

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First published in 1995. Routledge is an imprint of Taylor & Francis, an informa company.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
In recent years attempts to improve the performance of nozzle, rotors, compressors, airfoil sections, wings, and airplanes have revived research efforts in transonic aerodynamics. The present investigation describes various aspects of transonic flow calculations by a relaxation method. Of primary interest are techniques to reduce computational times for three-dimensional flows. Solutions of the small disturbance and full three-dimensional potential flow equations are obtained for two- and three-dimensional geometries. Several different geometries are considered. (Modified author abstract).

Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722973872
Category :
Languages : en
Pages : 190

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Book Description
This research effort is directed towards an examination of issues involved in porting large computational fluid dynamics codes in use within the industry to a distributed computing environment. This effort addresses strategies for implementing the distributed computing in a device independent fashion and load balancing. A flow solver called TEAM presently in use at Lockheed Aeronautical Systems Company was acquired to start this effort. The following tasks were completed: (1) The TEAM code was ported to a number of distributed computing platforms including a cluster of HP workstations located in the School of Aerospace Engineering at Georgia Tech; a cluster of DEC Alpha Workstations in the Graphics visualization lab located at Georgia Tech; a cluster of SGI workstations located at NASA Ames Research Center; and an IBM SP-2 system located at NASA ARC. (2) A number of communication strategies were implemented. Specifically, the manager-worker strategy and the worker-worker strategy were tested. (3) A variety of load balancing strategies were investigated. Specifically, the static load balancing, task queue balancing and the Crutchfield algorithm were coded and evaluated. (4) The classical explicit Runge-Kutta scheme in the TEAM solver was replaced with an LU implicit scheme. And (5) the implicit TEAM-PVM solver was extensively validated through studies of unsteady transonic flow over an F-5 wing, undergoing combined bending and torsional motion. These investigations are documented in extensive detail in the dissertation, 'Computational Strategies for Three-Dimensional Flow Simulations on Distributed Computing Systems', enclosed as an appendix. Sankar, Lakshmi N. and Weed, Richard A. Unspecified Center APPLICATIONS PROGRAMS (COMPUTERS); BALANCING; CODING; COMPUTATIONAL FLUID DYNAMICS; DISTRIBUTED PROCESSING; THREE DIMENSIONAL FLOW; ALGORITHMS; FLOW EQUATIONS; MAN MACHINE SYSTEMS; RUNGE-KUTTA METHOD; STATIC LOADS; TRANSONIC FLOW; UNSTEADY FLOW...