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Thermodynamic analysis of viscous compressible flow in a nozzle considering real gas effectsShepard, William Steve 08 1900 (has links)
No description available.
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On the Retrieval of Mixing Height from CeilometersBiavati, Gionata 16 July 2014 (has links) (PDF)
The subject of this thesis is the application of optical backscatter measurements to locate a special property of the lowest part of the atmosphere -- the mixing height.
Mixing height is the altitude of the top of the layer where all the fluxes emitted at the ground become well mixed.
Since Holzworth in 1967, the knowledge of this altitude is considered relevant when modeling transport of pollutants or general fluxes originating at the ground.
Indirect estimations of the mixing height are possible using atmospheric models, but its accuracy is quite low.
Since several institutions are attempting to estimate precise ground fluxes, networks of measurement stations are being created.
The correct use of the measured fluxes, in order to estimate the evolution of the air masses, is limited by the accuracy of the localization of this layer.
It can be detected in several different ways. Most are related to a direct sounding, performed with meteorological balloons.
Remote sensing techniques are also attempted with acoustical or optical instruments.
Both optical and acoustical methods have advantages and disadvantages.
This work is focused on optical instruments like lidar and ceilometers, which are basically small cost-effective lidar systems.
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Numerical modelling of neutral and stably stratified flow and dispersion in complex terrainApsley, David D. January 1995 (has links)
No description available.
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Mean wind and turbulence conditions over forestsArnqvist, Johan January 2013 (has links)
Vindkraft i skog
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Measurements in blown boundary layers and their prediction by Reynolds stress modellingIrwin, Hamlyn Peter Anthony Hugh January 1974 (has links)
No description available.
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A one-dimensional time-dependent air-water boundary layer model.Walmsley, John L., 1943- January 1972 (has links)
No description available.
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Ceilometer observations of Vancouver's urban boundary layer : validation and mixed-layer height estimationVan der Kamp, Derek 11 1900 (has links)
A mini-lidar system, Vaisala's CL31 ceilometer, was installed within a suburban area of Vancouver, BC, for the purpose of making continuous observations of the boundary layer over a period of 11 months. Initial validation of the ceilometer for use in boundary layer observations was undertaken. This involved the comparison of ceilometer data with eight months of ground-level particulate matter measurements, as well as with 16 vertical profiles of particulate matter and meteorological data. Once a variety of persistent noise structures within the data were accounted for, it was found that the ceilometer data showed good agreement with the particulate matter data, suggesting its usefulness for assessing air-quality throughout the bottom 1km of the atmosphere. Additionally, two algorithms were developed in order to estimate the height of the convective boundary layer, or the mixed-layer height, from the ceilometer data. One involved the fitting of an ideal-profile to the measured data, while the other involved the location of a minimum-gradient in the backscatter profile. The performance of these two techniques were assessed and compared, and it was found that the ideal-profile method was the more robust of the two. Finally, mixed-layer heights were estimated for fair weather, convectively active days. In order to isolate such conditions, an automatic flagging algorithm was developed. However, additional manual assessment was needed to avoided unsuitable conditions. Mixed-layer heights were estimated for 19 days over an 11 month period. the estimates presented here were found to agree with previous observations. Daily maximum mixed-layer heights ranged from 650m in July to 350m in December, indicating that the height of the convective boundary layer within Vancouver is significantly suppressed due to the city's coastal location.
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Measurement of interactions between solid and fluid surfaces : deformability, electrical double layer forces and thin film drainageConnor, Jason N. Unknown Date (has links)
Thesis (PhD)--University of South Australia, 2001
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The theoretical interaction between a fluid drop and a rigid solid /Bachmann, Darren John. Unknown Date (has links)
The problem of determining the electrical double-layer interaction between a rigid planar surface and a deformable liquid droplet is formulated as a pair of coupled differential equations. The Young-Laplace equation, describing the shape of the droplet subject to a range of pressures, is solved numerically, while the linearized Poisson-Boltzmann equation, which describes the double-layer interaction is solved analytically. The van der Waals force is also considered. Results are provided over a wide range of boundary conditions, electrolyte concentrations and internal pressures. / Thesis (MSc(AppPhysics))--University of South Australia, 2001.
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Measurement of interactions between solid and fluid surfaces : deformability, electrical double layer forces and thin film drainageConnor, Jason N. Unknown Date (has links)
Thesis (PhD)--University of South Australia, 2001
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