scispace - formally typeset
Search or ask a question
Author

V. Rammohan Rao

Bio: V. Rammohan Rao is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Convection & Fin (extended surface). The author has an hindex of 4, co-authored 4 publications receiving 124 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, an experimental investigation of free convection and radiation in a horizontal fin array is carried out, where a differential interferometer is used to obtain free convective heat transfer and radiation is calculated by solving the integro-differential equations numerically.

71 citations

Journal ArticleDOI
TL;DR: The Gaussian quadrature method with nonlinear transformation to map the boundary has been found to be the most accurate, computationally faster and very general.

44 citations

Journal ArticleDOI
TL;DR: In this paper, a numerical study was carried out to obtain fluid flow and heat transfer characteristics in respect of rectangular and elliptical ducts, rotating about a parallel axis situated parallel to and away from their axes.

17 citations

Journal ArticleDOI
TL;DR: In this article, a detailed experimental investigation of interaction of free convection and radiation in a single fin mounted on a heated horizontal base has been carried out, which makes use of a differential interferometer for estimating the convective heat fluxes.

8 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this paper, the effects of radiation and convection heat transfer in porous media are considered, and the results suggest that the radiation transfers more heat than a similar model without radiation.

159 citations

Journal ArticleDOI
TL;DR: In this article, an experimental investigation was conducted to measure the convective heat transfer coefficient and thermal performance of plate fins and plate cubic pin-fins heat sinks, under natural convection regime.

109 citations

Journal ArticleDOI
TL;DR: Yuncu and Guvenc as discussed by the authors investigated the steady-state natural convection heat transfer from aluminum vertical rectangular fin extending perpendicularly from vertical rectangular base, and found that the convective heat transfer rate from fin arrays depends on geometric parameters and base-to-ambient temperature difference.
Abstract: The steady-state natural convection heat transfer from aluminum vertical rectangular fins extending perpendicularly from vertical rectangular base was investigated experimentally. Thirty different fin configurations were tested. Experiments were performed for fin lengths of 250 and 340 mm. Fin thickness was kept fixed at 3 mm. Fin height and fin spacing were varied from 5 to 25 mm and 5.75 to 85.5 mm, respectively. Five heat inputs ranging from 25 to 125 W were supplied for all fin configurations, hence; the base-to-ambient temperature differences were measured in order to evaluate the heat transfer rates from fin arrays. The results of experiments have shown that the convective heat transfer rate from fin arrays depends on geometric parameters and base-to-ambient temperature difference. The separate roles of fin height, fin spacing and base-to-ambient temperature difference were investigated. It was found that, for a given base-to-ambient temperature difference, the convective heat transfer rate from fin arrays takes on a maximum value as a function of fin spacing and fin height and an optimum fin spacing value which maximizes the convective heat transfer rate from the fin array is available for every fin height. These measurements were to extend data obtained earlier from aluminum fin-arrays using the same experimental system and method (Yuncu and Guvenc in Heat Mass Transfer 37:409–416, 2001). Data collated from earlier and present work cover the range of fin spacing from 4.5 to 85.5 mm. The fin length range was from 100 to 340 mm, the fin height from 5 to 25 mm and the number of fins per array 3 to 34. The range of base-to-ambient temperature difference was quite extensive, from 30 to 150 K. These results indicate that the optimum fin spacing is between 6.1 and 11.9 mm, for the fin arrays employed in the earlier and present work. A scale analysis is performed in order to estimate the order-of-magnitude of optimum fin spacing at a given fin length and base-to-ambient temperature difference. From the scale analysis, correlations to evaluate the optimum fin spacing value and the corresponding maximum convective heat transfer rate at a given fin length and base-to-ambient temperature difference were obtained.

93 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the effect of fin length and fin spacing on heat transfer and fluid flow characteristics in horizontal and vertical narrow enclosures with heated rectangular finned base plate.

91 citations

Journal ArticleDOI
TL;DR: In this article, the authors used an 880 LW AGEMA infrared camera to evaluate the surface distribution of the transmitted heat flux by measuring the temperature distribution on the surface of the thermoplastic sheet.

74 citations