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
More filters
TL;DR: In this article, a detailed study of the hydrodynamics of sedimentation tanks is presented using an Eulerian-Lagrangian approach to study the motion of solids in the tank.
Abstract: Sedimentation tanks are used in the process industry to separate the solid particles from the slurry to get the clarified liquid. A detailed study of the hydrodynamics of sedimentation tanks is presented here using an Eulerian-Lagrangian approach to study the motion of solids in the tank. The model, in its present form, is applicable only to nonflocculent discrete (Type I) settling. It is shown that a typical particle-eddy interaction can be characterized by a lower cut-off size below which the particles would be entrained by the eddy; and an upper cut-off size above which the particle would continuously settle through the sedimentation tank in spite of the recirculation. The effect of inlet configuration on the flow field as well as on the settling characteristics has been investigated. The simulations show that both the upper and the lower cut-off sizes for a sedimentation tank are considerably reduced by providing a tulip type of inlet with a conical deflector as compared to a straight inlet.
53 citations
TL;DR: Both biomasses exhibit synergistic behavior when blended with the three coals with casuarina being more synergetic than empty fruit bunch and some inhibitory effect has been noted for the high ash coal at the highest temperature.
52 citations
TL;DR: In this article, a detailed surface reaction mechanism for the decomposition of NH 3 to H 2 and N 2 on a Ni surface is presented for temperatures ranging from 700 to 1500 K and pressures from 5.3 to 100kPa.
48 citations
TL;DR: In this article, the effect of some of the parameters of underground coal gasification was investigated using pure oxygen or oxygen and steam as the gasifying agent, and it was shown that, unlike recent reports in the literature, product gas of reasonably high calorific value can be produced on a sustained basis without having to use highly superheated steam.
47 citations
TL;DR: In this article, the authors considered underground coal gasification as a hydrogen generator and investigated the possibility of coupling it with a solid oxide fuel cell (SOFC) to generate electrical power directly.
47 citations
Cited by
More filters
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