CURRENT INJECTION VORTEX PROMOTER FOR HEAT TRANSFER ENHANCEMENT IN A MAGNETOHYDRODYNAMIC DUCT FLOW
Published In: 5TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND MECHANICAL ENGINEERING
Author(s): AHMAD H. A. HAMID , GREGORY J. SHEARD , WISAM K. HUSSAM
Abstract: The quest for cleaner, cheaper and reliable energy has motivated the development of magnetic confinement fusion reactor technology as a possible means of harnessing the energy produced by nuclear fusion for power generation. However, the magnetohydrodynamic effects act to reduce the thermal-hydraulic performance of the duct flows within the cooling blankets. The present paper reports the investigation of the duct flow with current injection as a vortex promoter for the enhancement of the convection heat transfer. The results indicate a maximum enhancement of approximately 70% over the duct flow without current injection for the highest current amplitude investigated. The competing effects of the Lorentz force and Hartmann damping result in a non-monotonic trend of Nusselt number with respect to friction parameter, while increasing Reynolds number results in a monotonic increase of Nusselt number.
- Publication Date: 26-Sep-2016
- DOI: 10.15224/978-1-63248-105-4-23
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EVALUATION OF SEISMIC POUNDING BETWEEN ADJACENT BUILDINGS
Published In: 5TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND MECHANICAL ENGINEERING
Author(s): MOHAMED ABDEL-MOOTY , MOHAMED RAAFAT , NASSER ZAKI AHMED
Abstract: Insufficient separation distance between adjacent buildings may lead to their pounding resulting in damage or failure during strong earthquakes. Accordingly, most of the design codes specify a minimum separation or gap distance between adjacent buildings to prevent this pounding phenomenon. This research studies the seismic pounding between adjacent reinforced concrete buildings under various ground motions. It also investigates the factors affecting pounding and proposes a technique to mitigate it. Buildings are modeled as two-dimensional frames to idealize the adjacent buildings. The total of 10 different cases of adjacent frames with different height combinations. Nonlinear time history analysis is utilized using finite element computer program ETABS. Real earthquake records are scaled and used to simulate ground motion. Gap element is used to model pounding between buildings. The effect of variation of some design parameters on seismic pounding is investigated. Different parameters
- Publication Date: 26-Sep-2016
- DOI: 10.15224/978-1-63248-105-4-24
- Views: 0
- Downloads: 0