Global ETD Search
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Showing 1 to 7 of 7 for “"Rectangular cavities"”.
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Passive methods for suppressing acoustic resonance excitation in shallow rectangular cavities.
The flow-excited acoustic resonance in shallow rectangular cavities can be a source of severe noise and/or excessive vibration. This phenomenon is excited when one of the acoustic modes in the accommodating enclosure is coupled with the flow instabilities resulting from the shear layer formation at …
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Structure formation and fractionation in systems of colloidal rods
… a corrugated substrate, and a substrate with rectangular cavities. We analyze the fluid structure close to the substrate and substrate controlled fractionation. The spatial arrangement of long and short rods in front of the substrate depends sensitively on the substrate structure and the …
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Unsteady aerodynamics using high-order methods
… oscillatory fluid motion, such as the flow over rectangular cavities. There has been a significant amount of research performed on this topic over the years, both experimentally and numerically. The unsteady flow over rectangular cavities is the case study in this research. In this work, a …
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Theoretical and experimental investigation of chemical pattern etching
… were investigated. Chemical dissolution of rectangular cavities with active copper base and inert photoresist sidewalls was carried out in the presence of flowing acidic cupric chloride solutions. It was found that for a 3.5M CuCl$\sb2$ + 0.5M HCl + 0.5M KCl etching solution a salt film …
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Numerical Boundary Conditions for the Fourth -Order Accurate Finite -Difference Time -Domain Solution of Maxwell's Equations
… experiments using two- and three-dimensional rectangular cavities verify that the proposed numerical boundary conditions preserve the fourth-order accuracy of Fang's schemes. Simulations of electromagnetic wave propagations through rectangular waveguides demonstrate that the enhanced …
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The aeroacoustics response and shear layer dynamics of confined cavities subject to low Mach number turbulent flow
Cavities exposed to low Mach number flow in various engineering applications are often liable for generating flow-excited acoustic oscillations, resulting in large acoustic amplitudes and vibrations. This compromises the safety and reliability of critical equipment due to a phenomenon attributed to …
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Development of a Model for Predicting the Transmission of Sonic Booms into Buildings at Low Frequency
… model is applicable to structures with multiple rectangular cavities, isolated or interconnected with openings. The response of the fluid-structure system, including their fully coupled interaction, is computed in the time domain using a modal-decomposition approach for both the structural and …