Numerical Investigation on the Interaction Between Surface Roughness and Viscous Flows PDF Download
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Author: Wade William Huebsch
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
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Book Description
Over the last 60 years, there has been a great deal of research aimed at determining the impact of surface roughness on fluid flow and the mechanisms by which the resulting flow phenomena occur. The effects of surface roughness include increases in drag the likelihood of flow separation, and the ability to trigger premature transition to turbulent flow. The primary concern for aircraft performance is surface roughness on the leading edge of an airfoil, which can adversely affect the design characteristics. The research to date has examined many problems in this area and has continued to expand the knowledge base, but many gaps still exist for a full understanding of the roughness-fluid interaction. In this study, a numerical investigation is conducted to examine the impact of surface roughness on external viscous flows. The focus of this study is on different types of airfoil leading-edge roughness and how these surface perturbations interact with the external flow field. The freestream conditions are varied to include both steady and unsteady flow at a constant angle-of-attack or in pitch-up.
Author: Wade William Huebsch
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
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Book Description
Over the last 60 years, there has been a great deal of research aimed at determining the impact of surface roughness on fluid flow and the mechanisms by which the resulting flow phenomena occur. The effects of surface roughness include increases in drag the likelihood of flow separation, and the ability to trigger premature transition to turbulent flow. The primary concern for aircraft performance is surface roughness on the leading edge of an airfoil, which can adversely affect the design characteristics. The research to date has examined many problems in this area and has continued to expand the knowledge base, but many gaps still exist for a full understanding of the roughness-fluid interaction. In this study, a numerical investigation is conducted to examine the impact of surface roughness on external viscous flows. The focus of this study is on different types of airfoil leading-edge roughness and how these surface perturbations interact with the external flow field. The freestream conditions are varied to include both steady and unsteady flow at a constant angle-of-attack or in pitch-up.
Author: Xiaoyu Yang
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 206
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Author: Carl Steefel
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501502077
Category : Science
Languages : en
Pages : 496
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Book Description
This RiMG (Reviews in Mineralogy & Geochemistry) volume includes contributions that review experimental, characterization, and modeling advances in our understanding of pore-scale geochemical processes. The volume had its origins in a special theme session at the 2015 Goldschmidt Conference in Prague. From a diversity of pore-scale topics that ranged from multi-scale characterization to modeling, this work summarizes the state-of-the-science in this subject. Topics include: modification of thermodynamics and kinetics in small pores. chemo-mechanical processes and how they affect porosity evolution in geological media. small angle neutron scattering (SANS) techniques. how isotopic gradients across fluid–mineral boundaries can develop and how these provide insight into pore-scale processes. Information on an important class of models referred to as "pore network" and much more. The material in this book is accessible for graduate students, researchers, and professionals in the earth, material, environmental, hydrological, and biological sciences. The pore scale is readily recognizable to geochemists, and yet in the past it has not received a great deal of attention as a distinct scale or environment that is associated with its own set of questions and challenges. Is the pore scale merely an environment in which smaller scale (molecular) processes aggregate, or are there emergent phenomena unique to this scale? Is it simply a finer-grained version of the "continuum" scale that is addressed in larger-scale models and interpretations? The scale is important because it accounts for the pore architecture within which such diverse processes as multi-mineral reaction networks, microbial community interaction, and transport play out, giving rise to new geochemical behavior that might not be understood or predicted by considering smaller or larger scales alone.
Author:
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ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 542
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Author:
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Category : Aeronautics
Languages : en
Pages : 568
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Author: Kin Leung Lam
Publisher:
ISBN:
Category :
Languages : en
Pages : 368
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 922
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Author: S. Murakami
Publisher: Elsevier
ISBN: 0444598618
Category : Technology & Engineering
Languages : en
Pages : 925
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Book Description
The aim of this volume is to explore the challenges posed by the rapid development of Computational Fluid Dynamics (CFD) within the field of engineering. CFD is already essential to research concerned with fluid flow in civil engineering, and its further potential for application in wind engineering is highly promising. State-of-the-art papers from all over the world are contained here, illuminating the present parameters of the field, as well as suggesting fruitful areas for further research. Eleven papers have been contributed by invited speakers outstanding in the fields of CFD and wind engineering. This volume will serve as a vehicle to promote further development in computational wind engineering.
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Category : Aeronautics
Languages : en
Pages : 538
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