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Showing 1 to 19 of 19 for “"Cylindrical cavity"”.
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An experimental study on the collapse of an air-filled cylindrical cavity under dynamic loading
… insight into the interactions of an air-filled cylindrical bubble immersed in hydrogel, a compliant boundary, and a transient loading wave. This combination is an analog of processes that occur in biomedical applications such as shockwave lithotripsy. No-boundary, rigid boundary, and …
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A Numerical Study of the Dynamic Response of A Cylindrical Cavity Subjected to Ground Wave Disturbance
Made available in DSpace on 2014-12-10T22:21:45Z (GMT). No. of bitstreams: 1 7212227.pdf: 3078248 bytes, checksum: 6979b0e77d45ec8758c80a9fde691803 (MD5) Previous issue date: 1971
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Dielectric characterization using a Wideband Dielectric Filled Cavity (WDFC)
… of frequencies. In the two configurations, a cylindrical cavity completely filled with a sample of the dielectric material of interest is used. The two configurations are the following: 1. The cylindrical cavity is adapted to the end of a transmission line and the reflection coefficient is …
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Separation Bubbles and Vortex Formation in Cavity Flows
… of vortices and separation bubbles in a square cavity as well as in a cylindrical cavity. Whereas there has been previous research work on the problem of a free stream over different types of cavities, like open and closed cavities or lid driven cavities, this research on an inlet induced flow …
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Online Electromagnetic Wave Monitoring System for Petroleum Industry Applications
… in a pipeline. These sensors are based on cylindrical cavity, and they use the resonant frequencies related to changes of permittivity to detect and measure (oil, gas, and water) components flowing in a pipeline. Special emphasis has been given to three main design principles. The principle …
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Uniform heating of thin ceramic slabs in a multimode microwave cavity
… and cylinders in a multi mode, highly resonant cavity. A thin ceramic slab situated in a TEN03 rectangular cavity modeled in the small Biot number limit and a thin silicon wafer situated in a TM101 cylindrical cavity modeled in the small fineness ratio limit are studied to gain insight into the …
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The Stability Properties of Some Rheological Flows
The stability of wall driven and thermally driven cavity flow is investigated for a wide range of viscous and viscoelastic fluids. The effect of inertia, elasticity, temperature gradients, viscous heating and Biot boundary conditions are of particular interest. Both destabilisation and bifurcation …
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Heat transfer model for the ignition of metal powder on a heated filament
… for a powder sample freely loaded in a thin cylindrical cavity made in a heat insulator. The pre-exponent identified by matching the computations with the experimental data is 1 x 10^{10} kg/m^2s. For the Mg powder, it is concluded that the thermal processes leading to ignition, for a range …
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Non-invasive electromagnetic wave sensor for flow measurement and biphase application
… the resonant frequencies that occur inside a cavity and the differences in the permittivity of the measures phases. By measuring this response over the range of discrete frequencies the sample can be characterised. Polar material like water has relatively high permittivity (ε_r= 81), while …
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Determination of geotechnical properties of seafloor sediment using a free fall penetrometer
… to determine the penetration behavior of a cylindrical probe free falling to the seafloor and to utilize the data obtained to evaluate the engineering properties of surficial sediment. Two experimental probes, each equipped with accelerometers, pressure sensors and optical backscatter …
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Method of Moments Analysis of an Aperture in a Thick Ground Plane
… ground plane. The conducting walls of the cavity inside the ground plane are of arbitrary shape. The apertures at both ends of the cavity are also of arbitrary shape. The structure is illuminated by an incident plane electromagnetic wave. The Green's function for this complicated problem is …
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Sound radiation prediction by scale models
… and a simple apparatus which consists of a rigid cylindrical cavity that is closed at one end by a flexible panel.</p> <p class="MsoNormal" style="margin-bottom:0cm;text-align:justify;line-height: normal;mso-layout-grid-align:none;text-autospace:none">The first model is intended to verify the …
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FOULING AND ITS MITIGATION ON HEAT EXCHANGER SURFACES BY ADDITIVES AND CATALYTIC MATERIALS
… was conducted with a 2.5 GHz microwave cavity resonator. The principle of electric dipole moment theories were used to analyse the sample solution that occurs as a function of calcium ion content. The sample was centrally positioned in the electric field of the TM010 mode of a resonant …
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The numerical and experimental investigation of gyro-multiplier configurations
… of components for the testing of a novel, single cavity gyro-multiplier experiment has been documented. In addition, numerical simulations of a configuration featuring three distinct cavity sections have also been conducted. The introduction of an eight-fold azimuthal corrugation into the walls of …
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The numerical and experimental investigation of gyro-multiplier configurations
… of components for the testing of a novel, single cavity gyro-multiplier experiment has been documented. In addition, numerical simulations of a configuration featuring three distinct cavity sections have also been conducted. The introduction of an eight-fold azimuthal corrugation into the walls of …
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Piezoceramic Actuated Transducers for Interior Acoustic Noise Control
… energy at the acoustic resonances of an enclosed cavity. The test setup involves using the transducer to lower the sound pressure levels of acoustic resonances which are excited by an external source, thus simulating the launch phase of a launch vehicle. The transducer is used as an actuator to …
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The aeroacoustics response and shear layer dynamics of confined cavities subject to low Mach number turbulent flow
… investigates the aeroacoustics response of cylindrical cavities having aspect ratios of h/L = 0.5, 1, and 1.5, where h is the cavity depth and L is the shear layer impingement length, up to flow velocities of Mach 0.4. In view of the cavity confinement, the effects of the admission ratio …
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Movements around a tunnel in two-layer ground
… the tunnel was represented by a SOmm diameter cylindrical cavity supported by compressed air pressure. The tunnel cavity was located within a layer of overconsolidated kaolin clay and in most cases the clay had an overlying layer of coarse grained material. The main variables in the tests were: …