Author
Sreenivas Jayanti
Other affiliations: Ohio State University, Imperial College London, Indian Institutes of Technology
Bio: Sreenivas Jayanti is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Pressure drop & Combustion. The author has an hindex of 37, co-authored 142 publications receiving 3884 citations. Previous affiliations of Sreenivas Jayanti include Ohio State University & Imperial College London.
Topics: Pressure drop, Combustion, Two-phase flow, Coal, Flow battery
Papers published on a yearly basis
Papers
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TL;DR: In this article, a linear relationship between the impeller speed and the local shear rate near the tip of a helical ribbon impeller has been found, which is applicable to both Newtonian and power-law fluids for power consumption.
Abstract: Helical ribbon impellers are widely used in chemical and process industries for the mixing of pseudoplastic fluids of high viscosity. The design of such impellers is based on an assumed linear relation between shear rate and the rotation speed of the impeller. A number of computational fluid dynamics (CFD) simulations of the flow field have been carried to verify this hypothesis. It is shown that while the shear rate varies greatly within the mixing vessel, there does exist a linear relationship between the impeller speed and the local shear rate near the tip of the impeller. The proportionality constant K s associated with this linear relation is found to be dependent on the geometric parameters of the system, but is largely independent of the flow behavior index. Based on these results, a new correlation, applicable to both Newtonian and power-law fluids for power consumption, is proposed.
27 citations
TL;DR: In this article, the effect of spacer grids on flow and heat transfer in rod bundles was investigated using the Eulerian-Lagrangian framework for calculating single-phase, vapour-only flow as well as the droplet-laden flow through a typical bundle geometry.
25 citations
TL;DR: In this article, a new correlation has been proposed to estimate the critical heat flux (CHF) in uniformly heated vertical tubes up to the critical pressure and over a wide range of parameters.
23 citations
TL;DR: In this paper, a proximate analysis of the coal samples from various locations of the heat-affected zone (HAZ) during borehole combustion and gasification studies which simulate experimentally underground coal gasification is presented.
23 citations
22 citations
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TL;DR: Oxy-coal combustion has generated significant interest since it was proposed as a carbon capture technology for newly built and retrofitted coal-fired power plants, and numerical models for sub-processes are also used to examine the differences between combustion in an oxidizing stream diluted by nitrogen and carbon dioxide as mentioned in this paper.
866 citations
TL;DR: The role of ammonia in future energy infrastructure is discussed in this article, where the authors focus on the catalytic decomposition of ammonia as a key step and highlight other aspects such as catalytic removal of ammonia from gasification product gas or direct ammonia fuel cells.
Abstract: The possible role of ammonia in a future energy infrastructure is discussed. The review is focused on the catalytic decomposition of ammonia as a key step. Other aspects, such as the catalytic removal of ammonia from gasification product gas or direct ammonia fuel cells, are highlighted as well. The more general question of the integration of ammonia in an infrastructure is also covered.
495 citations
TL;DR: In this paper, the challenges and the developments of direct ethanol fuel cells at present are addressed and the applications of DEFC are presented, as well as the challenges that need to be addressed.
461 citations
TL;DR: In this paper, a literature review on heat transfer and flow characteristics of single-phase and two-phase flow in curved tubes is presented, where three main categories of curved tubes; helically coiled tubes, spirally coiling tubes, and other coiled tube, are described.
Abstract: The performance of heat exchangers can be improved to perform a certain heat-transfer duty by heat transfer enhancement techniques. In general, these techniques can be divided into two groups: active and passive techniques. The active techniques require external forces, e.g. electric field, acoustic or surface vibration, etc. The passive techniques require fluid additives or special surface geometries. Curved tubes have been used as one of the passive heat transfer enhancement techniques and are the most widely used tubes in several heat transfer applications. This article provides a literature review on heat transfer and flow characteristics of single-phase and two-phase flow in curved tubes. Three main categories of curved tubes; helically coiled tubes, spirally coiled tubes, and other coiled tubes, are described. A review of published relevant correlations of single-phase heat transfer coefficients and single-phase, two-phase friction factors are presented.
441 citations
TL;DR: In this article, the authors provided information encompassing the recent discovery of the High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC) focusing on systems requirement.
419 citations