IJEA - Volume 4 Issue 10 (October 2015)

 


Sr/No/ Title Pdf
1 Analysis of Turbulence Intensity with square Ribs in Rectangular Duct of a Solar Air Heater using CFD
Priyank lohiya, Prof. S.k.Choudhary, Prof. Mahesh Kumar Tiwari

Abstract-Solar air heater is one of the basic equipment through which solar energy is converted into thermal energy. CFD is a simulation tool which uses powerful computer and applied mathematics, to model fluid flow situations for the prediction of heat, mass and momentum transfer and optimal design in various heat transfer and fluid flow processes. Performance of any system represents the degree of utilization of input to the system. It is required to analyze thermal and hydraulic performance of a solar air heater for making an efficient design of such type of a system. Artificial roughness up to laminar sub-layer to enhance heat transfer coefficient is used in various applications like gas turbine blade cooling channels, heat exchangers, nuclear reactors and solar air heaters. Turbulence is an important phenomenon in most of the fluid flows and contributes significantly to the transport of mass, momentum and heat. The artificial roughness has been used extensively for the enhancement of forced convective heat transfer, which further requires flow at the heat-transferring surface to be turbulent. A modern CFD code ANSYS FLUENT v12.1 is used to simulate fluid flow through a conventional solar air heater. The objective of the present work is to Analysis of Turbulence Intensity with square Ribs in Rectangular Duct of a Solar Air Heater using CFD as roughness elements provided at the wetted side of the bottom wall. The effect of roughness on turbulence intensity has been investigated for the range of Reynolds number from 3000 to 18000. It has also been observed that the rib-roughened surface in a rectangular duct produces higher turbulence intensities as compared to the smooth surface.

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2 Seismic Drift and Damage Consideration in RCC Multi- Storied Framed Buildings
M.P. Mishra, Dr.S.K.Dubey

Abstract-In the several countries seismic design is in process of fundamental change the one important reason for change is that from a life safety perspective, the level of damage to the structure, economic loss due to non –usage of building and the cost of repair is unexpectedly high. Although code designed buildings performed well in countries like USA in the recent earthquakes. In conventional methods of seismic design have the objective to provide for life safety through strength and ductility including damage control through serviceability i.e. drift limits .The new design code criteria are defined by limits on stress and member forces calculated from prescribed levels of applied lateral shear force Now the performance based design philosophy involves design criteria that are expressed in terms of achieving stated performance objectives when the structure is subjected to stated level of seismic hazard. The performance targets may be a level of stress, a load ,a displacement, a limit state, or a target damage not be exceeded .As requirement performance criteria for a seismic hazard are safety, restorability and usability. Safety refers to protection of human life, restorability refers to structural integrity and usability refers to function and habitability. Thus damage is definitely related mainly due to seismic drift of structure that may cause sudden collapse of building in severe earthquake. In this study (G+5) building is being analyzed to know drifting limits under different zones from damage safety point view by STAAD PrO-Vi8 and results obtained has summarized.

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3 Cluster Driven Refinement for Satellite Image Retrieval using improved retrieval techniques
Yogesh Darade, Kiran Bhandari

Abstract-The increased need of Image retrieval techniques are found in the domain like Satellite Imagery where the large volume of data are generated in various fields like forests, agriculture, disaster management etc. So the effective and efficient retrieval techniques are needed for Satellite Image retrieval. As the volume of Satellite imagery continuous to grow exponentially resulting in the huge database of satellite images, the efficient management of large collection of image database is becoming serious challenge. In order to overcome such problem the Clustering technique is used to manage the large database as the clustering is the powerful tool for analyzing the large volume of data. Therefore this paper provides the effective and efficient retrieval techniques for Satellite Image retrieval along with the clustering of large database for fast retrieval. The proposed system indexes the images into database based on the color and tag and groups them into the set of clusters. Clustering constructs taxonomy of images based on color as well as tag by forming groups of closely related images. Queries can be performed on color, tag and the combination of both color and tag to improve the accuracy of retrieval results. The experimental results shows that the system adapts the queries into database with features like color, tag, and combination of both which shows the effectiveness of proposed system.

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4 A Review Paper on Recycled Aggregate Concrete
Kushwaha Gargee, Bais Prasoon Kumar, Pandey Dayashankar

Abstract-The main ingredient in producing concrete is Aggregate. It almost covers 75% of the total for any concrete mix. The strength of the concrete produced is dependent on the properties of aggregates used. However, the construction industry is increasingly making higher demands of this material and is feared to accommodate the many requests at one time.

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5 Analysis of Compressive Strength for Recycled Concrete
Kushwaha Gargee, Bais Prasoon Kumar, Pandey Dayashankar

Abstract-In this paper report we have discussed about the use of recycled concrete aggregate in the concrete and the effects on its compressive strength by progressively replacing the natural concrete aggregate (NCA) by recycled aggregate. It is the experimental study of recycled concrete aggregate (RCA) when it is compared with the natural concrete aggregate on account of its properties. Cubes having dimension 150x150x150 mm3 were casted using recycled aggregate by replacing the natural aggregate by 0%, 25%, 50% and 75% and corresponding results of compressive strengths were noted. The compressive strength was noted by crushing the cube at 7, 14 and 28 days and it was found that performance of concretes with 0% and 25% replacement of natural aggregate by recycled aggregate were quite similar to concrete without replacement but with 50% and 75% replacement, the strength of concrete was decreased.

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6 Mathematical modelling and investigation for effect of mass flow rate in the Compact heat exchanger
Patel Bhoopendra, Shrivastava Pavan

Abstract-Heat transfer is the most important industrial processes, carried out by heat exchangers in both single and multiphase flow applications. For different heat transfer mechanisms the existence of well-developed theoretical models are available. The expanding need for industrial applications requiring the design and optimization of heat exchangers has created a solid demand for experimental work and effort.

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7 Numerical Simulation of Centrifugal Compressor (SRF) Model Using CFX
Shukla Pooja, Shrivastava Pavan

Abstract-In industrial applications Turbo compressors are widely used. Centrifugal compressor is the one type of these machines, which converts kinetic energy in to pressure energy. The Performances of Turbo compressors are use to be analysed by two main result data: pressure ratio and efficiency. These two parameters are varying with volume flow and with the machine rotational speed.

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8 Study of Transient Analysis for Pin-Fin by CFD
Ahirwal Rajesh Kumar, Rastogi Ajit Prakash, Dixit Santosh

Abstract-For more than a decade, investigations have been conducted to better understand the fluid flow and heat transfer characteristics in silicon-based micro channel heat sinks designed for applications in electronic cooling. These non-circular channels and silicon based micro channel heat sinks combine the attributes of high material compatibility, high surface area per unit volume ratios and large potential heat transfer performance with highly sophisticated and economic fabrication process. These advantages make these silicon based micro channel heat sinks extremely attractive for a wide variety of commercial applications. In this study we analyse electronic chips cooling with forced convection of water in silicon based single micro channel heat sinks by the help of a commercial CFD software FLUENT. The computational domain is discredited with non-uniform grids on the flow face but uniform grid along the flow. For single micro channel, the grid is generated by implementing Gambit software, which is incorporated with Cooper method for 3-dimensional grid generation.

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9 Study of Nox Reduction for a Marine Diesel Engine Using CFD
Saurabh Verma, Nitin Malviya, Dixit Santosh

Abstract-The combustion of a modern slow speed diesel engine produces exhaust gases which consist of gases such as NOx, SOx, CO, CO2. of these NOx is most important due their possible carcinogenic effect, contribution to photochemical smog formation over cities. This NOx converted to fine particles and nitrate aerosols. These particles get through the lungs and small enough to pass through the tissue and enter the blood. They can then trigger inflammations which eventually cause heart and lungs failure. So the world governing bodies framed rules and regulation for the industry to follow in order to reduce the amount of NOx discharge in the atmosphere. One of the classical methods is evaluating and then limiting the NOx emission is in the form of Tier 1, 2 and 3 in the marine industry. Now in order to continue the transport business the shipping industry has to follow these Nox emission criteria.

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10 A Review Paper on Comparative Study of Heliacal Heat Exchanger by CFD
Raj Vicky, Dahare Snatosh

Abstract-Enlarging the transformation of heat by the use of helical coil heat exchanger has been studied and researched by many researchers, because the dynamics of fluid inside the pipes of a helical coil heat exchanger offer certain advantages over the shell and tube type, straight tubes heat exchanger, in terms of better transformation of heat and mass transfer coefficients. Various configurations of coil configuration are possible, and the structure in which there is a series of vertically unstructured helically coiled tube is the most common type. The one end of the tubes act as the inlet and other end act as outlet manifolds, which serve the purpose for the entry and exit of hot as well as cold fluid. This configuration offers a high compact configuration and a high overall heat transfer coefficient; hence helical coil heat exchangers are extensively used in industrial applications such as power sector like nuclear power generation plants, power plants, heat recovery systems, refrigeration and air conditioning industries, food processing plants, food industry, industrial HVACs etc.

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11 Performance Evaluation of Routing Protocols for Mobile Ad-Hoc and Sensor Networks
M. Divya Kiranmaye, P. Sreenivasa Rao

Abstract-In mobile ad hoc networks nodes may move from one location to another on variety of node speed. As the result, the network topology changes continuously and unpredictably. Only within a short period of time neighbouring nodes can lose communication link, especially when the mobility is high. Thus, frequent change of network topology is a tough challenge for many important issues, such as routing protocol robustness, and performance degradation resiliency. Hence energy efficient routing protocols are required for the design of durable and efficient wireless sensor networks. For the aforementioned problems this paper work focuses on evaluation of performance of a routing protocol for ad hoc like Ad-hoc On-Demand Distance Vector Routing (AODV), Ad hoc On-demand Multipath Distance Vector(AOMDV) and energy management protocols for sensor networks Stable Election Protocol (SEP), New Hierarchical Stable Election Protocol (NHSEP). For ad hoc network the simulations are obtained for DSR, AODV, and AOMDV protocols; The Simulation is done using three different scenarios: varying the connections, varying the number of nodes and varying the node speed. The simulation has been carried out using NS 2 Network Simulator.

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