Download or read book Colliding Natural Convection Boundary Layer Flow in a Rectangular Enclosure written by Weigung Wang and published by . This book was released on 1989 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colliding Thermal Boundary Layers written by S. Vidakovic and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural convection in an enclosure continues to interest researchers and designers due to a broad range of applications. Buoyancy-driven colliding boundary layers are of particular interest because of the complex flow structure. They are generated by convective flows when the heat source is directly below the heat sink on the same vertical surface of the enclosure. An example of a practical application which exhibits this phenomenon occurs in a room with a strip heater located below a cool window. An experimental program was set up to measure temperature and velocity fields in a definitive study of the flow generated by wall mounted heat sources and sinks. This was achieved using tracer particles suspended in water to measure the velocity, implementing particle image velocimetry (PIV). The software used in this analysis is a CSIRO generated package "flowmap". The fluid temperature was measured using a thermocouple traversed through the model. The PIV results are preliminary, and serve here to validate some of the predicted velocity vectors within the flow. The same problem was analysed using computational fluid dynamics to predict the details of the convective flow structure. The computer program comprises a second-order finite difference formulation of the Navier Stokes equations and is carried out on a 42x42x42 non-uniform grid. The results from the numerical simulation are compared with the experimental measurements for a Rayleigh number (Ra) = 3 x 109. Some results for higher Rayleigh numbers are also mentioned.
Download or read book Laminar Natural Convection in Rectangular Enclosures written by Guatam Shrinath Shiralkar and published by . This book was released on 1980 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1991 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Blockage of Natural Convection Boundary Layer Flow in a Multizone Enclosure written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports the results of an experimental study that examines the transition between flow regimes, as a function of aperture size, in a two-zone enclosure with heated and cooled end walls. A constant heat flux boundary condition was maintained on one vertical end wall, and an isothermal cold temperature sink was maintained on the opposite vertical end wall. All of the remaining surfaces were highly insulated. The transition between the boundary layer driven regime and the bulk density driven regime was established as a function of the geometry of the aperture in the partition that separated the hot and cold zones. The results demonstrate that transition from the boundary layer driven regime to the bulk density driven regime is caused by blockage of the boundary layer flow, when the area of the flow aperture is reduced below a critical value. A simple flow model has been developed which predicts that the critical aperture area for the onset of flow blockage is directly proportional to the number of active heat transfer surfaces and inversely proportional to the Rayleigh number which characterizes the level of heating and cooling provided to the active heat transfer surfaces.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Renewable Energy Technologies written by Nayan Kumar and published by John Wiley & Sons. This book was released on 2022-09-27 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: RENEWABLE ENERGY TECHNOLOGIES With the goal of accelerating the growth of green energy utilization for the sustainability of life on earth, this volume, written and edited by a global team of experts, goes into the practical applications that can be utilized across multiple disciplines and industries, for both the engineer and the student. Green energy resources are gaining more attention in academia and industry as one of the preferred choices for sustainable energy conversion. Due to the energy demand, environmental impacts, economic needs, and social issues, green energy resources are being researched, developed, and funded more than ever before. Researchers are facing numerous challenges, but there are new opportunities waiting for green energy resource utilization within the context of environmental and economic sustainability. Efficient energy conversion from solar, wind, biomass, fuel cells, and others are paramount to this overall mission and the success of these efforts. Written and edited by a global team of experts, this groundbreaking new volume from Scrivener Publishing presents recent advances in the study of green energy across a variety of fields and sources. Various applications of green energy resources, modeling and performance analysis, and grid integration aspects of green energy resources are considered. Not only laying out the concepts in an easy-to-understand way, but this team offers the engineer, scientist, student, or other professional practical solutions to everyday problems in their daily applications. Valuable as a learning tool for beginners in this area as well as a daily reference for engineers and scientists working in these areas, this is a must-have for any library.
Download or read book Natural Convection in an Enclosure with Discrete Roughness Elements on a Vertical Heated Wall written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural convection flow next to a heated wall with single and repeated, two-dimensional, rectangular roughness elements is studied numerically and experimentally. The objective is to determine how these roughness elements influence heat transfer rates from the wall. Each roughness element consists of a thermally conducting, horizontal cylinder of rectangular cross section attached to the heated, isothermal wall of an enclosure. The height of roughness is on the order of the boundary layer thickness. Dye flow visualization in water confirms the numerical prediction that the steady flow over these elements does not separate. Only at high Rayleigh numbers, when the boundary layer below the roughness is unsteady, is local instantaneous flow reversal observed. Although steady flow reversals near the wall are not predicted or observed, nearly stagnant regions are formed, particularly between closely spaced cylinders. The surface heat flux in these stagnant regions is relatively low, so the total heat transfer rate may be nearly the same as for a smooth wall in spite of the increased surface area.
Download or read book Proceedings of 2005 JKUAT Scientific Technological and Industrialisation Conference written by and published by . This book was released on 2006 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Investigation of the Natural Convection Boundary Layer Over a Uniform Flux Inclined Surface written by Hussain Shaukatullah and published by . This book was released on 1978 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Convection in Enclosures written by Mark Wayne Nansteel and published by . This book was released on 1982 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Numerical Observations of Colliding Free Convection Boundary Layers written by Yuguo Li and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a preliminary investigation of oscillatory flow caused by two opposing free convection boundary layers, which can be found in a number of building airflow applications. A second-order numerical simulation is carried out to investigate both the 2D and 3D colliding free convection boundary layers at low Rayleigh numbers. The present predicted non-dimensional frequency of the periodic flow and onset of oscillation agree well with the experimental data of Kitamura et al. (1984). It is found that three-dimensional oscillations of the flow at some Rayleigh numbers are accompanied by a well-organised array of secondary vortices. It is suggested that the Taylor-Rayleigh instability causes the formation of secondary vortices and fingering of fluids across the colliding fluid interface, which then leads the two-dimensional oscillations into three-dimensional instabilities.
Download or read book Handbook of Thermal Management of Engines written by P. A. Lakshminarayanan and published by Springer Nature. This book was released on 2022-01-01 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook deals with the vast subject of thermal management of engines and vehicles by applying the state of the art research to diesel and natural gas engines. The contributions from global experts focus on management, generation, and retention of heat in after-treatment and exhaust systems for light-off of NOx, PM, and PN catalysts during cold start and city cycles as well as operation at ultralow temperatures. This book will be of great interest to those in academia and industry involved in the design and development of advanced diesel and CNG engines satisfying the current and future emission standards.
Download or read book Heat Transfer 1994 written by Geoffrey Frederick Hewitt and published by . This book was released on 1994 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Modelling of Fluid Dynamics and Nanofluids written by Katta Ramesh and published by CRC Press. This book was released on 2023-09-29 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Modelling of Fluid Dynamics and Nanofluids serves as a comprehensive resource for various aspects of fluid dynamics simulations, nanofluid preparation, and numerical techniques. The book examines the practical implications and real-world applications of various concepts, including nanofluids, magnetohydrodynamics, heat and mass transfer, and radiation. By encompassing these diverse domains, it offers readers a broad perspective on the interconnectedness of these fields. The primary audience for this book includes researchers and graduate students who possess a keen interest in interdisciplinary studies within the realms of fluid dynamics, nanofluids, and biofluids. Its content caters to those who wish to deepen their knowledge and tackle complex problems at the intersection of these disciplines.
