Turbulent Flow In A 180 Deg Bend Modeling And Computations

DOWNLOAD

Download Turbulent Flow In A 180 Deg Bend Modeling And Computations PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Turbulent Flow In A 180 Deg Bend Modeling And Computations book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Turbulent Flow In A 180 Deg Bend

DOWNLOAD
Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-15

Turbulent Flow In A 180 Deg Bend written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-15 with categories.

A low Reynolds number k-epsilon turbulence model was presented which yields accurate predictions of the kinetic energy near the wall. The model is validated with the experimental channel flow data of Kreplin and Eckelmann. The predictions are also compared with earlier results from direct simulation of turbulent channel flow. The model is especially useful for internal flows where the inflow boundary condition of epsilon is not easily prescribed. The model partly derives from some observations based on earlier direct simulation results of near-wall turbulence. The low Reynolds number turbulence model together with an existing curvature correction appropriate to spinning cylinder flows was used to simulate the flow in a U-bend with the same radius of curvature as the Space Shuttle Main Engine (SSME) Turn-Around Duct (TAD). The present computations indicate a space varying curvature correction parameter as opposed to a constant parameter as used in the spinning cylinder flows. Comparison with limited available experimental data is made. The comparison is favorable, but detailed experimental data is needed to further improve the curvature model. Kaul, Upender K. Unspecified Center NAS2-11555...

Turbulent Flow In A 180 Degree Bend Modeling And Computations

DOWNLOAD
Author : Upender K. Kaul
language : en
Publisher:
Release Date : 1989

Turbulent Flow In A 180 Degree Bend Modeling And Computations written by Upender K. Kaul and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

Turbulent Flow In A 180 Deg Bend Modeling And Computations

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1989

Turbulent Flow In A 180 Deg Bend Modeling And Computations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

Turbulent Flow In A 180 Bend

DOWNLOAD
Author : Upender Krishnen Kaul
language : en
Publisher:
Release Date : 1989

Turbulent Flow In A 180 Bend written by Upender Krishnen Kaul and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Turbulence categories.

Turbulent Flow In A 1800 Bend

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1989

Turbulent Flow In A 1800 Bend written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

Developing Turbulent Flow In A 180 Degree Bend And Downstream Tangent Of Square Cross Sections

DOWNLOAD
Author : J. A. C. Humphrey
language : en
Publisher:
Release Date : 1982

Developing Turbulent Flow In A 180 Degree Bend And Downstream Tangent Of Square Cross Sections written by J. A. C. Humphrey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.

A detailed account is given of the experimental and numerical modeling activities for the research period, relating to turbulent flow in a 180 deg curved duct. The measurements show variations in the flow field which, while understood, are not predictable by a K-epsilon model of turbulence. Numerical diffusion and exaggerated physical diffusion in the turbulence model are believed to be the major causes for the discrepancies observed. The new experimental data offered here should be of value for extending the theoretical base for the improved understanding and modeling of 3-D turbulent flows. Recommendations are made for continuing work.

Turbulent Flow In Passage Around A 180 Deg Bend An Experimental And Numerical Study

DOWNLOAD
Author : Joseph A. C. Humphrey
language : en
Publisher:
Release Date : 1983

Turbulent Flow In Passage Around A 180 Deg Bend An Experimental And Numerical Study written by Joseph A. C. Humphrey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.

Laser doppler velocimeter measurements for turbulent flow in a 180 degree bend of square cross-section are presented and discussed. These reveal previously undocumented anisotropic features in the flow. Limited data are also provided for the flow in the downstream tangent. Numerical predictions of the flow configurations were made with two types of turbulence models. The two-equation model yields results in broad agreement with the data but fails to reproduce detailed variations present in the flow. It is shown that while the algebraic stress model can resolive these variations, good spatial resolution of the mean flow field is required.

Tackling Turbulent Flows In Engineering

DOWNLOAD
Author : Anupam Dewan
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-10-23

Tackling Turbulent Flows In Engineering written by Anupam Dewan and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-10-23 with Technology & Engineering categories.

The emphasis of this book is on engineering aspects of fluid turbulence. The book explains for example how to tackle turbulence in industrial applications. It is useful to several disciplines, such as, mechanical, civil, chemical, aerospace engineers and also to professors, researchers, beginners, under graduates and post graduates. The following issues are emphasized in the book: - Modeling and computations of engineering flows: The author discusses in detail the quantities of interest for engineering turbulent flows and how to select an appropriate turbulence model; Also, a treatment of the selection of appropriate boundary conditions for the CFD simulations is given. - Modeling of turbulent convective heat transfer: This is encountered in several practical situations. It basically needs discussion on issues of treatment of walls and turbulent heat fluxes. - Modeling of buoyancy driven flows, for example, smoke issuing from chimney, pollutant discharge into water bodies, etc

Modelling And Simulation Of Turbulent Heat Transfer

DOWNLOAD
Author : B. Sundén
language : en
Publisher: WIT Press
Release Date : 2005-02-21

Modelling And Simulation Of Turbulent Heat Transfer written by B. Sundén and has been published by WIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-02-21 with Science categories.

Providing invaluable information for both graduate researchers and R & D engineers in industry and consultancy, this book focuses on the modelling and simulation of fluid flow and thermal transport phenomena in turbulent convective flows. Its overall objective is to present state-of-the-art knowledge in order to predict turbulent heat transfer processes in fundamental and idealized flows as well as in engineering applications. The chapters, which are invited contributions from some of the most prominent scientists in this field, cover a wide range of topics and follow a unified outline and presentation to aid accessibility.

The Effects Of Streamline Curvature And Swirl On Turbulent Flows In Curved Ducts

DOWNLOAD
Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-23

The Effects Of Streamline Curvature And Swirl On Turbulent Flows In Curved Ducts written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-23 with categories.

A technique for improving the numerical predictions of turbulent flows with the effect of streamline curvature is developed. Separated flows, the flow in a curved duct, and swirling flows are examples of flow fields where streamline curvature plays a dominant role. A comprehensive literature review on the effect of streamline curvature was conducted. New algebraic formulations for the eddy viscosity incorporating the kappa-epsilon turbulence model are proposed to account for various effects of streamline curvature. The loci of flow reversal of the separated flows over various backward-facing steps are employed to test the capability of the proposed turbulence model in capturing the effect of local curvature. The inclusion of the effect of longitudinal curvature in the proposed turbulence model is validated by predicting the distributions of the static pressure coefficients in an S-bend duct and in 180 degree turn-around ducts. The proposed turbulence model embedded with transverse curvature modification is substantiated by predicting the decay of the axial velocities in the confined swirling flows. The numerical predictions of different curvature effects by the proposed turbulence models are also reported. Cheng, Chih-Hsiung and Farokhi, Saeed Unspecified Center DUCTED FLOW; EDDY VISCOSITY; FLOW DISTRIBUTION; K-EPSILON TURBULENCE MODEL; MATHEMATICAL MODELS; SEPARATED FLOW; TURBULENT FLOW; BACKWARD FACING STEPS; COMPUTATIONAL FLUID DYNAMICS; CURVATURE; SWIRLING...