Browsing Doctoral Dissertations by Author "Mohany, Atef"
Now showing items 1-7 of 7
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Development of polymer based nanocomposite using electrospinning for sound absorption and isolation
Elkasaby, Mohamed Ali (2017-01-01)Excessive noise has adverse effects on human health. Therefore, it is necessary to find innovative methods for decreasing the exposure to noise in the environment. Various materials are used for dampening noise. In order ... -
Development of thermoplastic foams with heterogeneous cellular structures for acoustic applications
Naeem, Ibrahim Samir Saad (2016-08-01)Manufacture of heterogeneous thermoplastic foams is of great interest to damp low frequency noise in transportation and building industries. Most of the fabrication methods reported either use cumbersome batch processes ... -
Flow characteristics and acoustic resonance excitation of finned cylinders in cross-flow
Alziadeh, Mohammed (2022-12-01)The flow characteristics and acoustic resonance excitation of bare and finned cylinders of different arrangements in cross-flow were experimentally investigated. In the design phase of finned tube heat exchangers, finned ... -
Flow-sound interaction mechanism of a single finned cylinder in cross-flow
Arafa, Nadim (2017-04-01)The flow-sound interaction mechanism of a single finned cylinder in cross-flow is experimentally investigated and compared to that resulting from an equivalent bare cylinder. The flow field changes that result from the ... -
Investigation of the ultrasonic based hydrogen production process: Sonohydrogen
Seifeldin, Sherif Samir Ahmed Rashwan (2021-04-01)The present work carries out various sets of numerical investigations to link the primary effect of the acoustic parameters with the secondary effect of developing a chemical reaction mechanism for water vapor dissociation ... -
Modeling and analysis of metal cutting process using self-propelled rotary tools
Ahmed, Waleed A. Abdelfattah (2021-02-01)Machining difficult-to-cut materials is still one of the challenges facing different industries such as aerospace, nuclear and automotive sectors. That’s mainly because of the excessive heat generated, which affects the ... -
Numerical investigation of the fluidelastic instability of two-phase flow in a parallel triangular tube array
Sadek, Omar (2021-05-01)Steam generators are always susceptible to vibrations induced by the flow in either the shell or tube sides. The fluidelastic instability phenomenon (FEI) is considered one of the most devastating flow excitations since ...