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Book Experimental Investigation of Turbulent Flow in a Cylinder flat Plate Junction Configuration with an Upstream Circular Manipulator

Download or read book Experimental Investigation of Turbulent Flow in a Cylinder flat Plate Junction Configuration with an Upstream Circular Manipulator written by Alan Dow and published by . This book was released on 2002 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Dissertation Abstracts International

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Developments and Advances in Defense and Security

Download or read book Developments and Advances in Defense and Security written by Álvaro Rocha and published by Springer. This book was released on 2018-04-05 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes a selection of articles from The 2018 Multidisciplinary International Conference of Research Applied to Defense and Security (MICRADS’18), held in Salinas, Peninsula de Santa Elena, Ecuador, from April 18 to 20, 2018. MICRADS is an international forum for researchers and practitioners to present and discuss the most recent innovations, trends, results, experiences and concerns in the various areas of defense and security, together with their technological development and applications. The main topics covered are: Information and Communication Technology in Education; Computer Vision in Military Applications; Engineering Analysis and Signal Processing; Cybersecurity and Cyberdefense; Maritime Security and Safety; Strategy, Geopolitics and Oceanopolitics; Defense planning; Leadership (e-leadership); Defense Economics; Defense Logistics; Health Informatics in Military Applications; Simulation in Military Applications; Computer Networks, Mobility and Pervasive Systems; Military Marketing; Military Physical Training; Assistive Devices and Wearable Technology; Naval and Military Engineering; Weapons and Combat Systems; Operational Oceanography. The book is aimed at all those dealing with defense and security issues, including practitioners, researchers and teachers as well as undergraduate, graduate, master’s and doctorate students.

Book Experimental and Numerical Investigation of Developing Turbulent Flow Over a Wavy Wall

Download or read book Experimental and Numerical Investigation of Developing Turbulent Flow Over a Wavy Wall written by Vinicius Martins Segunda and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent flow over a wavy wall in a horizontal channel is investigated by experimental and numerical methods. The thorough problem understanding can advance turbulent flow physics knowledge for separating and reattaching flows. Another important consideration is the performance evaluation of mathematical models used in computational fluid dynamics (CFD) codes to predict the flow characteristics. This study explores numerical models because they are critically important to the design and performance evaluation of engineering systems. The experimental data are obtained to provide repository data and more insights into the flow physics considering both the flow development and fully periodic regions. A channel with a wavy bottom wall is considered for this study, and its main characteristic is a value of 10 for the ratio between the wave length and wave amplitude. A high-resolution particle image velocimetry (PIV) system is used to obtain detailed measurements of velocity at Reynolds number of 5040, 8400, 10700 and 13040 in both the developing and fully periodic regions. The numerical simulations are performed with a commercial CFD code using four eddy viscosity turbulence models and three Second-Moment Closure (SMC) turbulence models. This work assessed the predictive accuracy of a total of seven turbulence models. The experimental study covered a lack of data for the flow development within the waves, prior the periodic condition region, and it supported the turbulence models evaluation. The experiments provided features of the flow such as the recirculation regions, Reynolds stresses, and turbulent kinetic energy production at different channel locations. A comprehensive comparison between models and experimental data revealed a significant dependency on the turbulence model formulation and on the wall treatment selection for the flow development and fully periodic regions predictions.

Book Applied Mechanics Reviews

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1995 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book 41st AIAA Aerospace Sciences Meeting Exhibit

Download or read book 41st AIAA Aerospace Sciences Meeting Exhibit written by and published by . This book was released on 2003 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book American Doctoral Dissertations

Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Control of Junction Flows

Download or read book The Control of Junction Flows written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the effects of spatially-limited (i.e. localized) surface suction on unsteady laminar and turbulent junction flows was performed using hydrogen bubble flow visualization and Particle Image Velocimetry (PIV). Results indicate that suction on the laminar system can effectively modify the flow topology and periodicity. Detailed analysis of laminar PIV results indicates that it is the impinging boundary layer instability which is the mechanism for vortex generation frequency in the unsteady laminar case. Application of external perturbations to the impinging boundary layer can be used to initiate 'lock-on' of the vortex formation frequency to the forcing frequency over a narrow range of frequencies. PIV results of turbulent junction flow indicate that surface suction effectively weakens both the instantaneous turbulent vortex and the associated surface interactions on the symmetry plane, can eliminate the average turbulent necklace vortex on the symmetry plane, and weakens the average downstream strength of the vortex. It was also determined that suction effectively reduces the Reynolds-stress levels in both the symmetry plane and cross-stream planes, as well as reducing the unsteady behavior of the turbulent vortex legs.