http://13.232.72.61:8080/jspui/handle/123456789/203 2026-04-03T21:53:07Z 2026-04-03T21:53:07Z Dhar, B. K. Mahapatra, S. K. Maharana, S. K. Sarkar, A. http://13.232.72.61:8080/jspui/handle/123456789/2236 2020-02-12T09:07:27Z 2016-03-01T00:00:00Z

Title: Effect of Reynolds Number on Phase Change of Water Flowing Across Two Heated Circular Cylinders in Tandem Arrangement Authors: Dhar, B. K.; Mahapatra, S. K.; Maharana, S. K.; Sarkar, A. Abstract: The situations of fluid flow and heat transfer across an array of cylinders have been quite common in fluid dynamics and, particularly, industry applications. One such situation is flow of water over heated cylinders in a tandem arrangement. The flow of water over heated cylinders faces a phenomenon of phase change from liquid (water) to vapor phase (steam).The mechanism of this phase change is studied through a numerical simulation in this project. The Eulerian model is used in the present simulation method to comprehend the multiphase phenomenon. The effect of Reynolds number on the phase change is studied. The phase change of water in an unsteady flow across cylinders has been prominently affected by Reynolds number. Only critical cases have been discussed in this paper. The volume fraction of water and steam is plotted against the position of flow from inlet to exit of the flow domain that is a channel for a particular flow conditions to demonstrate the phenomenon of heat and mass transfer during the flow of water.

2016-03-01T00:00:00Z Dhar, B. K. Mahapatra, S. K. Maharana, S. K. Sarkar, A. Sahoo, S. S. http://13.232.72.61:8080/jspui/handle/123456789/2231 2019-05-17T10:20:03Z 2016-01-01T00:00:00Z

Title: Numerical Study on Phase Change of Water Flowing Across two Heated Rotating Circular Cylinders in Tandem Arrangement Authors: Dhar, B. K.; Mahapatra, S. K.; Maharana, S. K.; Sarkar, A.; Sahoo, S. S. Abstract: The problems of fluid flow and heat transfer phenomena over an array of cylinders are quite prominent in fluid dynamics and industry applications. The current work focuses on fluid flow and heat transfer analysis over two heated rotating cylinders arranged in tandem. The flow of water over heated cylinders faces a phenomenon of phase change from liquid (water) to vapor phase (steam). The mechanism of this phase change is studied through a numerical simulation supplemented with verification of the code and validation. The problem is simulated when flows from two cylinders in a tandem arrangement become interacting and non-interacting. The Eulerian model is used during simulation to comprehend the multiphase phenomena. The volume fractions of both the phases such as water and vapor and heat transfer coefficients of both the cylinders have been computed and presented as findings of the problem. The mass and heat transfer mechanism is unidirectional from one phase to the other phase. The vapor fraction of each phase is to be observed and compared when three different rotations are given to the two cylinders immersed in a turbulent flow of water.

2016-01-01T00:00:00Z Agrawal, Shweta Maharana, S. K. http://13.232.72.61:8080/jspui/handle/123456789/750 2019-01-03T11:29:33Z 2013-01-01T00:00:00Z

Title: Monte Carlo Simulation for Process Heat Cogeneration System Authors: Agrawal, Shweta; Maharana, S. K. Abstract: Cogeneration system could be defined as a system that supplies electricity power and heat energy simultaneously from a single source of fuel. This system is an effective one for industrial and domestic applications where both types of energy are demanded. One of the key issues in this thermal system is to maintain an effective generation of net work and its efficiency during its operation. One of the attempts to address this issue is to develop a thermodynamic model of wet compression and steam injection in combustor of the cogeneration system. Therefore it is necessary to analyze the model and observe through multiple numerical experiments how performance is improving by injecting suitable quantity of water into the compressor and steam into the combustion chamber. Thermodynamic model of wet compression and steam injection in a process heat cogeneration system is established in this paper. The objective of this paper is to find out the critical input parameters and to find out the effect of input parameters on output with the help of Monte Carlo Simulation.

2013-01-01T00:00:00Z Somashekar V. http://13.232.72.61:8080/jspui/handle/123456789/285 2018-09-24T04:25:50Z 2014-06-11T00:00:00Z

Title: A Computational Investigation of Unsteady Aerodynamics of Insect-Inspired Fixed Wing Micro Aerial Vehicle’s 2D Airfoil Authors: Somashekar V. Abstract: AMicro air vehicle (MAV) is defined as class of unmanned air vehicle (UAV) having a linear dimension of less than 15 centimeters and a mass of less than 100 grams with flight speeds of 6 to 12 meters per second. MAVs fall within a Reynolds number (Re) range of 50,000 and 120,000, in which many causes of unsteady aerodynamic effects are not fully understood.The research field of low Reynolds number aerodynamics is currently an active one, with many defence organizations, universities, and corporationsworking towards a better understanding of the physical processes of this aerodynamic regime. In the present work, it is proposed to study the unsteady aerodynamic analysis of 2D airfoil using CFD software and Xfoil panel code method. The various steps involved in this work are geometric modelling using CATIA V5R17,meshing using ICEM CFD, and solution and postprocessing through FLUENT. The finite control volume analysis and Xfoil panel code method has been carried out to predict aerodynamic characteristics such as lift coefficients, drag coefficients, moment coefficients, pressure coefficients, and flow visualization. The lift and drag coefficients were compared for all the simulations with experimental results. It was observed that for the 2D airfoil, lift and drag both compared well for the midrange angle of attack from −10 to 15 degree AOA.

2014-06-11T00:00:00Z