iosr-JMCE   Volume-17 ~ Issue-2 ~ mar. - apr. 2020

Abstract: Background:The study of the optimization of horizontal axis hydrokinetic turbineperformances using computational fluid dynamics (CFD), creates awareness on the recent development in renewable energy industries and enhanced the output power of the Hydrokinetic power plant. In this work. the effect of TSR and chord length was investigated using CFD approach and. the results shows that power coefficient (Cp) depends on TSR and slightly affected by chord length. Materials and Method:A three dimensional CFD analysis performed using ANSYS CFX 15.0 and SolidWorks as Preprocessor to draw the rotor, boundary conditions were created using the pre-processing tool solid-works, Hydrofoil SG-6043 was chosen for the simulation and mesh was created using structured quadrilateral cells around the hydrofoils. The computational.......

Keywords: ANSYS CFX 15.0, Chord Length, Power Coefficient (Cp),Solidity (𝜎), Tip speed ratio(TSR}

[1]. Myers, L and A.S. Bahaj,(2006): Power output performance characteristic of a horizontalAxis marine current turbine,' Renewable energy, vol. 31: pp. ; 197-208.
[2]. Myers, L and A.S. Bahaj,(2007): Wake studies of a 1/30th scale horizontalAxis marine current turbine,' ocean engineering, vol. 34: pp. ; 758-762.
[3]. Nkemjika M. A, (2014): Assessment of Offshore Renewable Energy Utilization Potentials and a Hybrid Power Plant Design for a Nigerian Coastal Area. A MEng Thesis Presented to the School of Graduate Studies, University of Port Harcourt
[4]. Nigerian Bulletin (2014): Nigeria Now Has Capacity to Generate 6000MW Electricity – Nebo. April 25, 2014. Retrieved: www.nigeriabulletin.com/thread/.
[5]. Vanguard, (2013): Power Supply: Nigerians generate over 600MW, FG 5482MW, Says UNILAG VC, Michael Eboh. Retrieved: www.vanguardngr.com/2013/03.

Abstract: In this study,natural convection and flow simulation in right-angled triangular rooftop enclosure when heated isothermally from the base wall (winter condition) are examined using ANSYS FLUENT as the design modeler. The effects of Rayleigh number, pitch angle, and the heating side on the flow structure and temperature distribution within the enclosure are investigated. Convection currents are noticed as the air rises from the hot base towards the cold roof forming plumes. The heat transfer within the enclosure reduces with increase in pitch angles. At low pitch angle, multiple heat flow circulations with high intensity between the cold inclined wall and hot base wall results in multicellular flow structure within the enclosure. But as the pitch angles and Rayleigh number increases, the number of cells reduces as small cells emerged to form bigger ones, which shows proper mix of air within the enclosure.The practical significance of the results is that the flow patterns and thermal characteristics of the attic space presented will be of a great value to professionals engaged in design and analysis of building attics, to ensure proper functions of the attics and its energy efficiency.

Key Words: Natural convection, Pitch angle, Right-angled triangular roof shape, ANSYS FLUENT

[1]. Asan, H. and Namli, L., (2001) "Numerical simulation of buoyant flow in a triangular roof under winter day boundary conditions", Energy Buildings, Vol. 33, pp. 753-757
[2]. Aydin, O. and Yang, J., (2000) "Natural convection in enclosures with localized heating from below and symmetrically cooling from sides", Int. J. Numerical methods; Heat Fluid Flow, vol. 10, pp. 518 – 529.
[3]. Bejan, A. and Poulikakos, D., (1982) "Natural convection in an attic shaped space filled with porous material" Journal Heat Transfer, Vol. 104, pp. 241-247
[4]. Flack, R. D., (1980) "The Experimental Measurement of Natural Convection Heat Transfer in Triangular Enclosures Heated or Cooled from Below", J. Heat Transfer, Vol.102, pp.770 -772.
[5]. Hasani, S.M.F., Chung, B.T.F., (1997) "Laminar Natural Convection in a Triangular Enclosure", Proc. ASME Ocean Engineering Division, D.T. Valentine, and C.C. Jahnke, (eds.), pp.107-116

Abstract: the recent earthquakes, concrete structures have been severely damaged or collapsed, whichhas raised concerns against the seismic capacity of concretestructures. These reinforcedconcrete buildings need to be evaluated to determine the capacity to resist seismic loads. The behaviorof a building during earthquakes depends critically on its overall shape, size and geometry.Conventional approach to earthquake resistant design of buildings depends upon providing thebuilding with strength, stiffness and inelastic deformation capacity which are great enough towithstand a given level of earthquake-generated force. This is generally accomplished through theselection of an appropriate.....

Keywords: Pushover Analysis, Seismic Performance, Base Shear, Building Configuration

[1]. Sharjubanand Jisha P. (2019). "Seismic Response Reduction Factor Evaluation for Irregular RC Structures".IJERT: ISSN: 2278-0181
[2]. Anil K. Chopra and Rakesh K. Goel (1987). "Evaluation of torsional provisions in seismic codes". Earthquake Engineering
[3]. Research Centre, University of California, Berkeley, Calif.
[4]. NFALLAH, POURZEYNALI and M.I. HAFEZI (2011) "Accuracy Evaluation of the Modal Pushover Analysis Method in the Prediction of Seismic Response of Vertically Irregular Frames" IJST, Transactions of Civil EngineeringVol. 35, No. C2, pp 171-184.
[5]. Tezcan, S.S., Alhan, C., (2001) "Parametric analysis of irregular structures under seismic loadingaccording to the new Turkish Earthquake Code"Engineering Structures, 23, (2001), pp.600–609.

Abstract: The main idea behind this paper is to remove the conventional system into an automatic system. The necessity for the safety and prevention of fuel in two-wheeler automobiles is essential since there are lots of fuel theft and vehicle theft occurring day by day in a conventional system.The automatic fuel control valve can be used in this situation because this system is a digitally password operated locking system. Thus the operation of the fuel control valve mainly depends upon the digital password operated locking system. This system has greater safety and control of the valve. The automatic fuel control valve has been fabricated for the simple operation.For the fabrication of the.....

Keywords: Fuel Control Valve, Fuel Indicator, Digital LockingSystem, PIC16F877A, L293D Motor Drive, Rapid Prototype.

[1]. Jade, Nitin, et al. "Modified Type Intelligent Digital Fuel Indicator System." IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684, p-ISSN: 2320-334X PP 20-23 in International Conference on Advances in Engineering & Technology–2014 (ICAET. 2014.). [2]. Varghese, Jaimon Chacko, and Binesh Ellupurayil Balachandran. "Low-Cost Intelligent Real-Time Fuel Mileage Indicator for Motorbikes." International Journal of Innovative Technology and Exploring Engineering 2.5 (2013): 97-107.
[3]. http://www.rakeshmondal.info/L293D-Motor-Driver.
[4]. https://en.wikipedia.org/wiki/Fuel-control_unit.
[5]. http://microcontrollerslab.com/LCD-interfacing-pic16f877a-microcontroller/.

Abstract: The state of the system on which urban mobility in Bosnia and Herzegovina in all cities depends is unsatisfactory and requires a detailed analysis of the situation and an assessment of the trend in relation to the strategic directions of development in the world. Public transport of passengers is designated as an extremely important system for establishing sustainable mobility. The paper identifies key information that reflects the trend of development of public urban transport in the world and analyzes the state of public urban passenger transport at the level of the city of Sarajevo. The transport policy of the City of Sarajevo is analyzed and its commitment to be based on the principles of sustainable development and innovations in transport, transport and communication technology.

Key Word:Planning; Strategy; Mobility; Public transport; Sustainable development; Innovation; Traffic; Transport; Communications; Choice models; Demand; Intercity transportation; Mode choice; Passenger transportation; Public transit; Route choice; Supply; Travel demand; Trip distribution; Urban transportation; Sarajevo.

[1]. Dawes, M., & Zhao, J. (2017). User Identification of and Attitude Toward Dynamic Ridesourcing Services (No. 17-04418).
[2]. Fishman, E., Washington, S., Haworth, N., & Watson, A. (2015). Factors influencing bike share membership: An analysis of Melbourne and Brisbane. Transportation research part A: policy and practice, 71, 17-30.
[3]. Jung, J., &Jayakrishnan, R. (2012). High-coverage point-to-point transit: Electric vehicle operations. Transportation research record, 2287(1), 44-53.
[4]. Kaplan B, Truex D. P, Wastell D, Wood-Harper A, T. &DeGross, J, Information Systems Research: Relevant Theory and Informed Practice. Springer, 2010.
[5]. Khattak, A. J., &Kanafani, A. (1997). PLANiTS: Structuring and supporting the Intelligent Transportation Systems planning process. Transportation research record, 1588(1), 32-40.

Abstract: This paper presents an experimental and analytical investigation of sand coated Glass Fiber-Reinforced Polymer(GFRP)barreinforcedbeamandsandcoatedGFRP-RCbeamstrengthenedwithFiberglassEpoxyFlatStrip. Inthiswork,threebeamswerecastandtested.ThebeamsweredesignatedasB1,B2,and,B3.B1wascastwithsteel reinforcement, B2 was cast with GFRP and, B3 was cast as B2 and the Fiberglass Epoxy Flat Strip was fixed using Epoxy Resin at the bottom surface. All three Beams were tested under static loading and observed the load-carrying capacity, deflection, and crack patterns. The experimental results showed that the GFRP strip could improve the structural performance of the sand coated GFRP-RC beam by increasing the load-carryingcapacity. The analytical investigation was done using the "ABAQUS" software. The outcome got from ABAQUS software was compared to experimentalresults.

Key Word: Reinforced concrete beams, Sand Coated GFRP bars, Fiberglass epoxy flat strip, strength, and load-deflection

[1]. Abd El-Hakim Khalil, Emad Etman, Ahmed Atta, Mohamed Essam, "Nonlinear behavior of RC beams strengthened with strain-hardening cementitious composites subjected to monotonic and cyclic loads", Tanta University, Tanta, Egypt, Alexandria Engineering Journal(2016).
[2]. Amirul F. Rahman, W.I. Goha, N. Mohamad, M. Sufian Kamarudina, Ashfaque Ahmed Jhatialb, "Numerical analysis and experimental validation of reinforced foamed concrete beam containing partial cement replacement", Case Studies in Construction Materials 11 (2019)e00297.
[3]. Bo Gao, Jang-Kyo Kim, Christopher K.Y. Leung, "Experimental study on RC beams with FRP strips bonded with rubber modified resins", Composites Science and Technology 64 (2004)2557–2564.
[4]. G.M.Chen,J.G.Teng,J.F.Chen,"ProcessofdebondinginRCbeamsshearstrengthenedwithFRPU-strips or side strips", International Journal of Solids and Structures 49 (2012)1266–1282.
[5]. M.W. Goldstona, A. Remennikovb, Zein Salehb, M. Neaz Sheik, "Experimental investigations on the behavior of GFRP bar reinforced HSC and UHSC beams under static and impact loading", Structures 22 (2019)109-123.