Download or read book An Experimental Investigation of the Performance of Staggered PIN FIN Array Laminar Flow Heat Exchangers written by and published by . This book was released on 2005 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study concentrates on the empirical characterization of a staggered pin-fin array heat exchanger placed in a modular, rectangular wind tunnel. A full analysis of the heat transfer and pressure drop behavior was conducted on various pin-fin shapes, sizes, and configurations. The study was based on airflow over a wide range of Reynolds numbers in the laminar regime. The empirical data gathered can be used to corroborate and develop better numerical models to characterize the performance of such heat exchangers as well as scale down to the micro level for comparison with micro-heat exchangers.
Download or read book Numerical Analysis of the Performance of Staggered Pin Fin Micro Heat Exchangers written by Jui S. Choo and published by . This book was released on 2003-12-01 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The heat transfer and pressure drop characteristics of a staggered micro pin-fin heat exchanger were analyzed using a three dimensional finite element based numerical model. Simulations were conducted based on low Reynolds number, fully developed laminar airflow through an array of circular pin-fins. A range of results was obtained from different configurations with varying pin spacing, axial pitch and pin height. The results from this study would be useful in ongoing work on the design of a laminar flow micro heat exchanger for high heat flux dissipation systems.
Download or read book Numerical and Experimental Analysis of the Performance of Staggered Short Pin Fin Heat Exchangers written by Leonard J. Hamilton and published by . This book was released on 2003-06-01 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three dimensional finite element based numerical model was used to analyze the heat transfer characteristics of various staggered short pin-fin array heat exchangers. The simulation was validated against data from an experimental rig as well as historical data and then used to estimate the heat transfer coefficient and pressure drop for a wide range of Reynolds numbers for circular and airfoil-shaped pin fins. Circular pin configuration variations included changes in pin spacing, axial pitch and pin height ratio. Airfoil pin variations also included changes in length and aspect ratio. Correlations for Nusselt number and friction factor were developed. Using established performance metrics optimum configurations for both pin shapes were determined. The optimum airfoil pin array was shown to match the heat transfer rates obtained by the optimum circular pin configuration while incurring less than one third the specific fluid friction power loss. The results from this study would be of direct value in the design of a shroud enclosed heat exchanger concept being proposed for turbine blade cooling, or for cooling of high power electronic components, or in other high heat flux dissipation applications requiring a low- profile, high area-density based micro-heat exchanger design.
Download or read book An Empirical Study of a Pin Fin Heat Exchanger in Laminar and Turbulent Flow written by Jeffrey W. Summers and published by . This book was released on 2003-12 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study concentrates on the empirical characterization of a staggered array pin fin compact heat exchanger placed in a modular, rectangular wind tunnel. A full analysis of the heat transfer and pressure drop behavior was conducted on various pin-fin shapes, sizes, and configurations. The study was based on airflow over a range of low Reynolds numbers in the laminar and low turbulent flow, as well as higher turbulent flow regimes. The empirical data gathered can be used to corroborate and develop better numerical models to characterize the performance of such compact heat exchangers.
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 Numerical Simulation of Heat Exchangers written by W. J. Minkowycz and published by CRC Press. This book was released on 2017-04-07 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with certain aspects of material science, particularly with the release of thermal energy associated with bond breaking. It clearly establishes the connection between heat transfer rates and product quality. The editors then sharply draw the thermal distinctions between the various categories of welding processes, and demonstrate how these distinctions are translated into simulation model uniqueness. The book discusses the incorporation of radiative heat transfer processes into the simulation model.
Download or read book Heat Transfer Enhancement in Plate and Fin Extended Surfaces written by Sujoy Kumar Saha and published by Springer. This book was released on 2019-06-24 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Brief deals with heat transfer and friction in plate and fin extended heat transfer enhancement surfaces. It examines Offset-Strip Fin (OSF), Enhancement Principle, Analytically Based Models for j and f vs. Re, Transition from Laminar to Turbulent Region, Correlations for j and f vs. Re, Use of OSF with Liquids, Effect of Percent Fin Offset, Effect of Burred Edges, Louver fin, heat transfer and friction correlations, flow structure in the louver fin array, analytical model for heat transfer and friction, convex louver fin, wavy fin, 3D corrugated fin, perforated fin, pin fins and wire mesh, types of vortex generators, metal foam fin, plain fin, packings, numerical simulation of various types of fins.
Download or read book Applied Mathematical Modeling written by Eetu N. Virtanen and published by Nova Publishers. This book was released on 2008 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new book focuses on important research related to the mathematical modelling of engineering and environmental processes, manufacturing, and industrial systems. It includes heat transfer, fluid mechanics, CFD, and transport phenomena; solid mechanics and mechanics of metals; electromagnets and MHD; reliability modelling and system optimisation; finite volume, finite element, and boundary element procedures; decision sciences in an industrial and manufacturing context; civil engineering systems and structures; mineral and energy resources; relevant software engineering issues associated with CAD and CAE; and materials and metallurgical engineering.
Download or read book Journal of Thermophysics and Heat Transfer written by and published by . This book was released on 2002 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. It publishes papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include conductive, convective, and radiative modes alone or in combination and the effects of the environment.
Download or read book Compact Heat Exchangers written by Alexander Louis London and published by CRC Press. This book was released on 1990 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat exchangers are a crucial part of aerospace, marine, cryogenic and refrigeration technology. These essays cover such topics as complicated flow arrangements, complex extended surfaces, two-phase flow and irreversibility in heat exchangers, and single-phase heat transfer.
Download or read book Development of Novel Tapered Pin Fin Geometries for Additive Manufacturing of Compact Heat Exchangers written by Julien Harry Cohen and published by . This book was released on 2016 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pin fin arrays are widely used to enhance forced convection heat transfer across various industries, finding application in turbine blade trailing edges, electronics cooling, and broadly for compact heat exchange. Fin shape greatly affects flow separation and turbulence generation, and optimizing performance relies on a balance between increased heat transfer and increased pressure loss along the array. Straight circular pin fins are well-characterized in the literature, and recent works have proven more complex elliptical and teardrop cross-sectional shapes to exhibit performance enhancements in both parameters. There exist few studies in the public record on tapered circular pin fins, but these have also proven to exhibit performance enhancements. To date, no example of research has been identified for tapered, complex pin fin geometries, and although these represent an avenue for overall performance gains, manufacturing the intricate components is difficult and time-consuming using conventional machining processes. The unique and nascent capabilities of additive manufacturing now allow their economical fabrication in an increasing number of fully-dense engineering materials. This thesis compares 21 fin arrays of varying fin cross-section, taper angle, taper profile, and array pattern, separated into eight geometry families. Experimental testing was carried out on a prototype open-loop wind tunnel and corroborated with computational fluid dynamics simulations. Non-dimensional metrics were defined and used to holistically compare heat transfer efficiency, pressure loss characteristics, and overall balanced performance between fin arrays. Topics for future work and potential methods of investigation are suggested.
Download or read book Thermohydrodynamic Programming and Constructal Design in Microsystems written by Tao Dong and published by Academic Press. This book was released on 2018-10-20 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermohydrodynamic Programming and Constructal Design in Microsystems explains the direction of a morphing system configuration that is illustrated by life evolution in nature. This is sometimes referred to as the fourth law of thermodynamics, and was first applied in thermofluidic engineering, with more recent applications in physics and biology. The book specifically focuses on synthetic modeling and constructal optimization in the design of microsystemic devices, which are of particular interest to researchers and practitioners in the sphere of micro- and nanoscale physics, a mechanistically deviation from conventional theory. The book is an important reference resource for researchers working in the area of micro- and nanosystems technology and those who want to learn more about how thermodynamics can be effectively applied at the micro level. - Explains how the application of constructal theory can lead to more effective microsystems design - Offers an introduction to the fundamentals and application to different flow and heat/mass transport systems - Bridges the gap between theoretical design and optimization, from a practical point-of-view
Download or read book A Numerical Investigation of Thermal hydraulic Characteristics in Three Dimensional Plate and Wavy Fin tube Heat Exchangers for Laminar and Transitional Flow Regimes written by Satchit Pradip Panse and published by . This book was released on 2005 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The plate fin-and-tube heat exchangers are used in wide variety of industrial applications, particularly in the heating, air-conditioning and refrigeration industries. In most cases the working fluid is liquid on the tube side exchanging heat with a gas, usually air. The current study is focused on two fin configurations, the plain plate-fin and the wavy-fin. These two fin configurations are numerically investigated in both staggered and in-lined tube layouts. The present investigation ranges from laminar flow regime into the sub-critical or transitional flow regime. The suitability of the eddy viscosity turbulence models for the flow representation in the transitional flow regime is discussed in this study. This study reveals that the flow distinction between plain and wavy fin has a profound influence on the heat transfer and flow friction performance of these configurations when compared on the basis of tube layouts. The obtained results also indicate that the number of tube rows plays an important part for the overall heat exchanger performance and an optimum choice for the number of tube rows must be made in order to achieve the critical balance between high heat transfer performance and low pressure drop.
Download or read book Numerical and Experimental Study of the Performance of a Drop Shaped Pin Fin Heat Exchanger written by Jihed Boulares and published by . This book was released on 2003-06-01 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research presents the results or a combined numerical and experimental study or heat transfer and pressure drop behavior in a compact heat exchanger (CHE) designed with drop-shaped pin tins. A numerical study using ANSYS was first conducted to select the optimum pin shape and configuration for the CHE. This was followed by an experimental study to validate the numerical model. The results indicate that the drop shaped pin tins yield a considerable improvement in heat transfer compared to circular pin tins tor the same pressure drop characteristics. This improvement is mainly due to the increased wetted surface area of the drop pins, and the delay in the flow separation as it passes the more streamlined drop shaped pin tins. The data and conclusions of this study can he used in heat exchanger design tor large heat flux cooling applications as in gas turbine blades, and high-power electronics.
Download or read book Experimental Investigation on Performances of Trisection Helical Baffled Heat Exchangers for Oil water water Heat Transfer written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Fluid and Thermal Engineering written by Pankaj Saha and published by Springer. This book was released on 2019-04-23 with total page 831 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises select proceedings of the International Conference on Future Learning Aspects of Mechanical Engineering (FLAME 2018). The book gives an overview of recent developments in the field of thermal and fluid engineering, and covers theoretical and experimental fluid dynamics, numerical methods in heat transfer and fluid mechanics, different modes of heat transfer, multiphase transport and phase change, fluid machinery, turbo machinery, and fluid power. The book is primarily intended for researchers and professionals working in the field of fluid dynamics and thermal engineering.
Download or read book ITHERM written by and published by . This book was released on 2002 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
