Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 98 for “"Vertical velocity"”.
-
Vertical Velocity Distributions in Sand -Bed Alluvial Rivers
Shear partition models of Einstein and Nelson-Smith were evaluated with the field data collected in this research. Einstein's method had an absolute average percent error of 11.3%, while the Nelson-Smith method had an absolute average percent error of 22.2% when the smaller bedforms were used as …
-
On use of the anelastic vertical vorticity equation in dual-Doppler analyses of the vertical velocity field.
The potential for applying the anelastic vertical vorticity equation for dual-Doppler synthesis of the vertical wind field is explored. In particular, application of the vorticity equation as a weak variational constraint to retrieve the boundary condition field(s) is investigated. The …
-
Exploring Boundary Layer Dynamics: Steady and Unsteady Canopy Flows and The Vertical Velocity Skewness in Turbulent Boundary Layers
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Detection of oceanic convection utilizing submarine-observed acceleration
… by comparing actual submarine observations of vertical velocity with vertical velocity of a hypothetical submarine driven through a field of oceanic turbulence predicted by Large-Eddy Simulation (LES). The actual submarine data included time series of three-dimensional acceleration and …
-
The kinematics and kinetics of jumping for distance with particular reference to the long and triple jumps.
… is achieved by converting some of the horizontal velocity developed in the approach run into vertical velocity at take-off. The aim of this thesis was to examine a theoretical model and to identify kinematic and kinetic factors that facilitate the generation of vertical velocity in the long and …
-
Enhanced vertical mixing within mesoscale eddies due to high frequency winds in the south China sea
… forcing fields modifies the horizontal and vertical velocity patterns and impacts the transport properties in the basin. The response of the mesoscale circulation in the South China Sea is investigated under three different forcing conditions: monthly, daily and six-hourly momentum and heat …
-
Vertical fluxes in the upper ocean
… and submesoscale are associated with enhanced vertical motion, which strengthens their role in global biogeochemical cycling as hotspots of primary production and subduction of carbon from the surface to the interior. Using process study models, theory, and field observations of biogeochemical …
-
Vertical Fluxes in the Upper Ocean
… and submesoscale are associated with enhanced vertical motion, which strengthens their role in global biogeochemical cycling as hotspots of primary production and subduction of carbon from the surface to the interior. Using process study models, theory, and field observations of biogeochemical …
-
A numerical modelling study of Port Alfred upwelling along the inshore edge of Agulhas current
… events through the decomposition of the vertical velocity. To assess the influence of the wind, we measured the alongshore wind stress, wind stress curl and frictional velocity at different temporal scales. Our analysis showed that upwelling during summer was primarily driven by …
-
Dynamics of cloud-top generating cells in winter cyclones
… with initial conditions representative of the vertical structure of a cyclone observed during the Profiling of Winter Storms (PLOWS) campaign. First, sensitivity to radiative forcing under stability and shear representative of the 14-15 February 2010 cyclone observed during PLOWS was assessed …
-
Optimizing Lidar Scanning Strategies for Wind Energy Turbulence Measurements
… the three-dimensional wind field and the velocity variance contamination that can occur when a traditional Doppler-beam swinging (DBS) or velocity-azimuth display (VAD) strategy is used. In this work, several techniques for obtaining more accurate turbulence information from lidars were …
-
Studies in Unsteady Penetrative Thermal Convection
… instantaneous values of the temperature, the vertical velocity and horizontal velocity have been made using a thermocouple and a two-component dual beam laser Doppler velocimeter.
-
Monthly mean vertical motions over the Pacific Ocean
It is the purpose of this paper to compare vertical velocity with satellite observed cloud distribution in the tropics, especially with (1) the intertropical maximum cloud band in the Northern Hemisphere paralleling the equator and about 5 degrees north of it throughout the year, (2) the occurrence …
-
Modeling and Simulation of Autonomous Thermal Soaring with Horizon Simulation Framework
… The induced roll effect caused by the asymmetric vertical velocity distribution of a thermal was included in the aerodynamic roll moment calculation. The autonomous guidance algorithm for the glider included a turn logic which would determine the correct turn direction for the glider when a …
-
Examination of the magnitude and timing of hip flexion torque in high degree of difficulty forward somersault dives on the 3m springboard
… flexion torques prior to the take-off and the vertical velocity at take-off in high demand rotational forward dives. Twenty-six elite divers (14 males and 12 females) competing in the United Kingdom leg of the 2001 FINA Diving Grand Prix performed high demand rotational dives. The males …
-
Interaction of a vortex pair and a free-surface : numerical simulation
… intensity, the kinetic energy dissipation and velocity fluctuations. The turbulence intensity reaches a maximum at the level of the center of the primary vortex, and then decreases significantly as the free-surface is approached. This decay is due to a very large increase of the turbulent …
-
Numerical Analysis of Airflow and Output of Solar Chimney Power Plants
… was used to investigate air properties, such as velocity, temperature, and pressure. The results supported the claim that increasing the energy into the system increased both the velocities and temperatures. Also, increasing the turbine pressure drop decreases the velocities and increases the …
-
ΜΑΘΗΜΑΤΙΚΗ ΠΕΡΙΓΡΑΦΗ ΤΗΣ ΔΙΑΔΟΣΗΣ ΤΩΝ ΜΗ ΓΡΑΜΜΙΚΩΝ ΔΙΑΣΠΕΙΡΟΜΕΝΩΝ ΚΥΜΑΤΙΣΩΝ ΣΤΟΝ ΠΑΡΑΚΤΙΟ ΧΩΡΟ
… FOR THE DISTRIBUTION OVER THE DEPTH OF THE VERTICAL VELOCITY WE PROPOSE AN EXTENSION OF THE EQUATIONS IN DEEPER WATERS. THE MODEL IS TESTED AGAINST EXPERIMENTAL DATA AND ANALYTICAL SOLUTIONS.
-
Understanding the Characteristics of Precipitation and Their Response to Climate Change
… extratropics and aim to understand changes in vertical velocity which control the spatial variation in the climate-change response of extratropical precipitation extremes. I solve the quasi-geostrophic omega equation and attribute the vertical velocity changes in two ways. In the dry …
Page 1 of 5