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Rupesh J. Yadav

Bio: Rupesh J. Yadav is an academic researcher from College of Engineering, Pune. The author has contributed to research in topics: Heat transfer & Turbulence. The author has an hindex of 4, co-authored 11 publications receiving 48 citations. Previous affiliations of Rupesh J. Yadav include Massachusetts Institute of Technology & Savitribai Phule Pune University.

Papers
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Journal ArticleDOI
TL;DR: In this article, the heat transfer enhancement characteristics of air flow inside a circular tube with a partially decaying and partly swirl flow were investigated using three different twist parameters (, 0.27, and 0.38).
Abstract: CFD investigation was carried out to study the heat transfer enhancement characteristics of air flow inside a circular tube with a partially decaying and partly swirl flow. Four combinations of tube with twisted-tape inserts, the half-length upstream twisted-tape condition (HLUTT), the half-length downstream twisted-tape condition (HLDTT), the full-length twisted tape (FLTT), and the plain tube (PT) with three different twist parameters (, 0.27, and 0.38) have been investigated. 3D numerical simulation was performed for an analysis of heat transfer enhancement and fluid flow for turbulent regime. The results of CFD investigations of heat transfer and friction characteristics are presented for the FLTT, HLUTT, and the HLDTT in comparison with the PT case.

25 citations

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TL;DR: In this article, the experimental and numerical investigations of heat transfer and friction factor characteristics for laminar flow through a non-circular duct with twisted-tape have been presented.

10 citations

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TL;DR: In this paper, the experimental and numerical Nusselt number and friction factor investigation for turbulent flow through a non-circular duct with twisted-tape inserts have been presented.
Abstract: The experimental and numerical Nusselt number and friction factor investigation for turbulent flow through a non-circular duct with twisted-tape inserts have been presented. The non-circular ducts include square, hexagonal duct. The results of non-circular ducts are compared with circular duct. All the ducts have same equivalent diameter. The twist ratios used for the experiment are Y = 3.5, 4.5, 5.5 and 6.5. Experiments were carried out on square duct, hexagonal duct and circular duct. The Reynolds number lied between 10,000 and 1, 05,000. The present study is restricted to the flow of air at Pr = 0.7 only and within a narrow temperature range of 40 to 75 ΟC, within which the compressible nature of air can be neglected. The results reveal that, both Nusselt number and friction factor increases as the side of non-circular duct increases. Maximum Nusselt number and friction factor is obtained in case of circular duct with twisted tape. Further the correlations of Nu and f are given for different non circular duct with twisted tape insert for engineering applications for the turbulent regime. Since the thermal performance factor (η) is observed to be within the range of 0.8 to 1.13 for both circular and noncircular ducts, the overall benefit of using twisted tape in the flow field shall nevertheless be marginal.

8 citations

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TL;DR: In this paper, a numerical analysis is carried out to study the flow physics of effect of dimple depth on heat transfer and fluid flow, where the cell count is based on grid independence study and y+ value.

6 citations

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TL;DR: In this article, the authors deal with experimental investigations of heat transfer and friction factor characteristics of perforated pin fin heat sink tested in a rectangular channel by using forced convection.
Abstract: This paper deals with experimental investigations of heat transfer and friction factor characteristics of perforated pin fin heat sink tested in a rectangular channel by using forced convection. Cy...

5 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors evaluated two-phase heat exchangers for single-phase flows and showed that they can achieve state-of-the-art performance in terms of heat transfer.

205 citations

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TL;DR: In this article, a comprehensive review about the developments and current status of this technology employed in different thermal energy systems including heat exchangers, mini/micro energy systems, two-phase flow energy system, jet impingement cooling systems, and solar thermal energy system is presented.

88 citations

Journal ArticleDOI
TL;DR: The National Research Foundation (NRF), the University of Pretoria's Institutional Research Theme (IRT) on Energy, the Solar Hub between Stellenbosch University and the University, supported by the Department of Science and Technology, the Tertiary Education Support Programme (TESP) of Eskom, the National Advisory Council on Innovation (NACI), the National Hub for the Postgraduate Programme in Energy-efficiency and Demand-side Management (EEDSM Hub), and the Council for Scientific and Industrial Research (CSIR).

63 citations

Journal ArticleDOI
TL;DR: In this paper, the heat transfer augmentation of turbulent single-phase flow in a concentric tube heat exchanger with short-length twisted tape inserts was numerically examined and the twisted tape length ratios were compared.
Abstract: Heat transfer augmentation of turbulent single-phase flow in a concentric tube heat exchanger with short-length twisted tape inserts was numerically examined herein. The twisted tape length ratios ...

48 citations

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TL;DR: In this paper, the authors investigated the hydraulic and heat transport performance of a silicon heat sink under a constant heat flux of 100 W/cm2 with liquid coolant running through parallel microchannels.

32 citations