International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
e-ISSN: 2395 -0056
www.irjet.net
p-ISSN: 2395-0072
PARAMETRIC STUDIES ON HEAT TRANSFER BY NATURAL CONVECTION IN VERTICAL CHANNEL USING INCLINED V-SLOT PLATE– AN OVERVIEW M.P Nimkar1 , Prateek Patil2 , Shubham Pattiwar2 , Prathamesh Pawar2 , Vijayanshu Game2 ,Piyush Yeole2 1Assistant
Professor, Department of Mechanical Engineering;Dr. Babasaheb Ambedkar College of Engineering & Research, Wanadongari, Nagpur – 441110, Maharashtra. INDIA. 2B.E, Department of Mechanical Engineering, Dr. Babasaheb Ambedkar College of Engineering & Research, Wanadongari, Nagpur – 441110, Maharashtra. INDIA. ------------------------------------------------------------------------***------------------------------------------------------------------------------
ABSTRACT Natural Convection flow in a vertical channel with internal objects is encountered in several technological applications of particular interest of heat dissipation from electronic circuits, refrigerators, heat exchangers, nuclear reactors fuel elements, dry cooling towers, and home ventilation etc. This study deals with the study of natural convection inside inclined v-slot plate placed in vertical channels. The parameters varied during the experimentation are heat input, aspect ratio (the ratio of length of inclined v-slot plate to the spacing between vertical plates) and elevation of inclined v-slot plate from bottom plate. The present study aims to determine the heat transfer characteristics, temperature distribution along the inclined v-slot plate to develop a correlation in the form of Nu = c (Ra)n for different values of aspect ratio, for the selection of optimum dimension for design purpose. Further, the influences of inclination of plate and aspect ratio on the performance characteristics of heat transfer will be studied.
Key Words: Natural convection, Inclined V-slot plate, Vertical plate, Aspect ratio 1. INTRODUCTION.
Natural convection heat transfer phenomena are two dimensional on vertical and horizontal plates but are three dimensional on inclined plates due to the circumferential and axial developments of the boundary layers making the flow as well as heat transfer behavior complex. A number of correlations are available in literature for the estimation of natural convection heat transfer from vertical as well as horizontal plates, but little work has been reported on the effect of plate inclination on the mean heat transfer coefficient. Inclination of containers filled with fluid, inside which convective heat or mass transfer occur, may have either desirable or undesirable effects depending on the application. Due to modern application of natural convective heat transfer in V-slot plate geometry has been widely studied for its applications in heat loss from piping, heat exchangers, HVAC systems,
Heat transfer is the area that deals with the mechanism responsible for transferring energy from one place to another when a temperature difference exists. Convective heat transfer in general is the heat transfer process that arises from fluid flow over or through a hot or cold surface where the fluid flow acts as a carrier of energy. The heating or cooling process is called natural convection if the fluid motion is induced only by the buoyancy forces. Latter of which buoyancy forces are induced from the density changes caused by the temperature gradient in the fluid region close to the heat transfer surface. In other words, a fluid attached to a hot or cold surface will change its temperature and therefore its density in the proximity of that surface, causing it to move up- or downward, depending on whether it is heated or cooled. © 2017, IRJET
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