Bibliografie tematiche / Wind mixing

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Letteratura scientifica selezionata sul tema "Wind mixing"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 19 febbraio 2022

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Articoli di riviste sul tema "Wind mixing"

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Largeron, Yann, Chantal Staquet e Charles Chemel. "Turbulent mixing in a katabatic wind under stable conditions". Meteorologische Zeitschrift 19, n. 5 (1 ottobre 2010): 467–80. http://dx.doi.org/10.1127/0941-2948/2010/0346.

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Atkinson, J. F., e D. R. F. Harleman. "Wind-mixing experiments for solar ponds". Solar Energy 38, n. 6 (1987): 389–403. http://dx.doi.org/10.1016/0038-092x(87)90020-x.

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Chen, Shih-Nan, e Lawrence P. Sanford. "Axial Wind Effects on Stratification and Longitudinal Salt Transport in an Idealized, Partially Mixed Estuary*". Journal of Physical Oceanography 39, n. 8 (1 agosto 2009): 1905–20. http://dx.doi.org/10.1175/2009jpo4016.1.

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Abstract A 3D hydrodynamic model [Regional Ocean Model System (ROMS)] is used to investigate how axial wind influences stratification and to explore the associated longitudinal salt transport in partially mixed estuaries. The model is configured to represent a straight estuarine channel connecting to a shelf sea. The results confirm that wind straining of the along-channel salinity gradient exerts an important control on stratification. Two governing parameters are identified: the Wedderburn number (W) defined as the ratio of wind stress to axial baroclinic pressure gradient force, and the ratio of an entrainment depth to water depth (hs/H). Here W controls the effectiveness of wind straining, which promotes increases (decreases) in stratification during down-estuary (up-estuary) wind. The ratio hs/H determines the portion of the water column affected by direct wind mixing. While stratification is always reduced by up-estuary wind, stratification shows an increase-then-decrease transition when down-estuary wind stress increases. Such transition is a result of the competition between wind straining and direct wind mixing. A horizontal Richardson number modified to include wind straining/mixing is shown to reasonably represent the transition, and a regime diagram is proposed to classify the wind’s role on stratification. Mechanisms driving salt flux during axial wind events are also explored. At the onset and end of the wind events, barotropic adjustment drives strong transient salt fluxes. Net salt flux is controlled by the responses of subtidal shear dispersion to wind forcing. Moderate down-estuary winds enhance subtidal shear dispersion, whereas up-estuary winds always reduce it. Supporting observations from upper Chesapeake Bay are presented.
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Hetland, Robert D. "Relating River Plume Structure to Vertical Mixing". Journal of Physical Oceanography 35, n. 9 (1 settembre 2005): 1667–88. http://dx.doi.org/10.1175/jpo2774.1.

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Abstract The structure of a river plume is related to the vertical mixing using an isohaline-based coordinate system. Salinity coordinates offer the advantage of translating with the plume as it moves or expanding as the plume grows. This coordinate system is used to compare the relative importance of different dynamical processes acting within the plume and to describe the effect each process has on the structure of the plume. Vertical mixing due to inertial shear in the outflow of a narrow estuary and wind mixing are examined using a numerical model of a wind-forced river plume. Vertical mixing, and the corresponding entrainment of background waters, is greatest near the estuary mouth where inertial shear mixing is large. This region is defined as the near field, with the more saline, far-field plume beyond. Wind mixing increases the mixing throughout the plume but has the greatest effect on plume structure at salinity ranges just beyond the near field. Wind mixing is weaker at high salinity classes that have already been mixed to a critical thickness, a point where turbulent mixing of the upper layer by the wind is reduced, protecting these portions of the plume from further wind mixing. The work done by mixing on the plume is of similar magnitude in both the near and far fields.
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Breitschwerdt, D., e F. D. Kahn. "Turbulent Mixing in Wind-Blown HII Regions". International Astronomical Union Colloquium 120 (1989): 117–21. http://dx.doi.org/10.1017/s025292110002354x.

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AbstractTurbulent mixing between an ionization bounded HII region and a hot shocked stellar wind (HSSW), which keeps it under pressure, is examined. Recently we have shown that acoustic disturbances can grow there to finite amplitude in a time scale which is comparable to the sound crossing time in the HII layer. The resulting turbulence will then stretch fluid elements and the frozen-in magnetic field. A condition under which turbulence can decay down to the viscous scale, where mixing is very efficient, is derived. For a uniform and plane parallel magnetic field Bo and a constant density ρo of the ambient medium, we find that efficient mixing takes place near the polar regions. Subsequently the rate of mass addition to the hot bubble is calculated and it is shown that catastrophic cooling is likely to occur. In the case of NGC 6334(A) it seems that this has just happened and we predict an upper limit for Bo of 4 x 10-5 gauss there. This model may also explain the existence of highly ionized species (e.g. OVI), soft X-rays and high velocity flows of the order of 100 km/s.
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Inoue, Ryuichiro, Michio Watanabe e Satoshi Osafune. "Wind-Induced Mixing in the North Pacific". Journal of Physical Oceanography 47, n. 7 (luglio 2017): 1587–603. http://dx.doi.org/10.1175/jpo-d-16-0218.1.

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AbstractTemporal variability of the winter input of wind energy flux (wind power) and its relationship to internal wave fields were examined in the North Pacific. The dominant long-term variability of the wind power input, estimated from a mixed layer slab model, was inferred from an empirical orthogonal function analysis, and it was found that variability partly corresponded to the strength and movement of the Aleutian low. Responses of the internal wave field to the input of wind power were examined for two winters with a meridional float array along 170°W at a sampling interval of 2 dbar. Time series of the vertical diffusivities inferred from density profiles were enhanced during autumn and winter. After comparing diffusivities inferred from densities sampled at 2- and 20-dbar intervals, Argo floats with a vertical resolution of 20 dbar were used to detect spatial and temporal variability of storm-related mixing between 700 and 1000 dbar in the North Pacific over a period of 10 years. Horizontal maps of inferred seasonal diffusivities suggested that the diffusivities were enhanced in autumn and winter. However, it is unlikely that there is a simple linear relationship between the input of wind power and the inferred mixing.
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Breitschwerdt, D., e F. D. Kahn. "Turbulent mixing in wind-blown HII regions". Astrophysics and Space Science 216, n. 1-2 (giugno 1994): 297–301. http://dx.doi.org/10.1007/bf00982508.

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Eidnes, G., T. Utnes e T. A. McClimans. "Wind mixing of a stratified shear flow". Continental Shelf Research 6, n. 5 (gennaio 1986): 597–613. http://dx.doi.org/10.1016/0278-4343(86)90025-7.

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Liu, Jing-Wu, Su-Ping Zhang e Shang-Ping Xie. "Two Types of Surface Wind Response to the East China Sea Kuroshio Front*". Journal of Climate 26, n. 21 (16 ottobre 2013): 8616–27. http://dx.doi.org/10.1175/jcli-d-12-00092.1.

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Abstract Effects of the sea surface temperature (SST) front along the East China Sea Kuroshio on sea surface winds at different time scales are investigated. In winter and spring, the climatological vector wind is strongest on the SST front while the scalar wind speed reaches a maximum on the warm flank of the front and is collocated with the maximum difference between sea surface temperature and surface air temperature (SST − SAT). The distinction is due to the change in relative importance of two physical processes of SST–wind interaction at different time scales. The SST front–induced sea surface level pressure (SLP) adjustment (SF–SLP) contributes to a strong vector wind above the front on long time scales, consistent with the collocation of baroclinicity in the marine boundary layer and corroborated by the similarity between the thermal wind and observed wind shear between 1000 and 850 hPa. In contrast, the SST modulation of synoptic winds is more evident on the warm flank of the SST front. Large thermal instability of the near-surface layer strengthens temporal synoptic wind perturbations by intensifying vertical mixing, resulting in a scalar wind maximum. The vertical mixing and SF–SLP mechanisms are both at work but manifest more clearly at the synoptic time scale and in the long-term mean, respectively. The cross-frontal variations are 1.5 m s−1 in both the scalar and vector wind speeds, representing the vertical mixing and SF–SLP effects, respectively. The results illustrate the utility of high-frequency sampling by satellite scatterometers.
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Skyllingstad, Eric D., Jenessa Duncombe e Roger M. Samelson. "Baroclinic Frontal Instabilities and Turbulent Mixing in the Surface Boundary Layer. Part II: Forced Simulations". Journal of Physical Oceanography 47, n. 10 (ottobre 2017): 2429–54. http://dx.doi.org/10.1175/jpo-d-16-0179.1.

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AbstractGeneration of ocean surface boundary layer turbulence and coherent roll structures is examined in the context of wind-driven and geostrophic shear associated with horizontal density gradients using a large-eddy simulation model. Numerical experiments over a range of surface wind forcing and horizontal density gradient strengths, combined with linear stability analysis, indicate that the dominant instability mechanism supporting coherent roll development in these simulations is a mixed instability combining shear instability of the ageostrophic, wind-driven flow with symmetric instability of the frontal geostrophic shear. Disruption of geostrophic balance by vertical mixing induces an inertially rotating ageostrophic current, not forced directly by the wind, that initially strengthens the stratification, damps the instabilities, and reduces vertical mixing, but instability and mixing return when the inertial buoyancy advection reverses. The resulting rolls and instabilities are not aligned with the frontal zone, with an oblique orientation controlled by the Ekman-like instability. Mean turbulence is enhanced when the winds are destabilizing relative to the frontal orientation, but mean Ekman buoyancy advection is found to be relatively unimportant in these simulations. Instead, the mean turbulent kinetic energy balance is dominated by mechanical shear production that is enhanced when the wind-driven shear augments the geostrophic shear, while the resulting vertical mixing nearly eliminates any effective surface buoyancy flux from near-surface, cold-to-warm, Ekman buoyancy advection.
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Tesi sul tema "Wind mixing"

1

Straneo, Fiammetta. "Dynamics of rotating convection including a horizontal stratification and wind /". Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/10996.

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Gahard, Claude F. "An estimation of the ability to forecast boundary layer mixing height and wind parameters through forecast verification over Fort Ord". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FGahard.pdf.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, September 2003.
Thesis advisor(s): Wendell A. Nuss, David S. Brown. Includes bibliographical references (p. 65-66). Also available online.
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Danner, William Porter. "A mixing length treatment of the effect of turbulence on the wind generation of water waves". Monterey, California: U.S. Naval Postgraduate School, 2013.

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Jones, Nicole Louise. "The role of wind-waves and currents on vertical mixing in shallow water bodies : implications for phytoplankton distribution /". May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Hyatt, Jason. "Wind, sea ice, inertial oscillations and upper ocean mixing in Marguerite Bay, Western Antarctic Peninsula : observations and modeling". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38254.

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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2006.
Includes bibliographical references.
Two years of moored oceanographic and automatic weather station data which span the winter ice seasons of 2001-2003 within Marguerite Bay on the western Antarctic Peninsula (wAP) shelf were collected as part of the Southern Ocean Global Ocean Ecosystems Dynamics program. In order to characterize the ice environment in the region, a novel methodology is developed for determining ice coverage, draft and velocity from moored upward-looking acoustic Doppler current profiler data. A linear momentum balance shows the importance of internal ice stresses in the observed motion of the ice pack. Strong inertial, not tidal, motions were observed in both the sea ice and upper ocean. Estimates of upward diapycnal fluxes of heat and salt from the Upper Circumpolar Deep Water to the surface mixed layer indicate almost no contribution from double diffusive convection. A one-dimensional vertical mixed layer model adapted for investigation of mixing beneath an ice-covered ocean indicates that the initial wind event, rather than subsequent inertial shear, causes the majority of the mixing. This work points towards episodic wind-forced shear at the base of the mixed layer coupled with static instability from brine rejection due to ice production as a major factor in mixing on the wAP shelf.
by Jason Hyatt.
Ph.D.
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Teysseyre, Raphaël. "Détection homodyne appliquée à la mesure de la vitesse du vent". Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0053/document.

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Dans cette thèse, nous étudions la détection homodyne (ou rétroinjection optique, ou self-mixing) appliquée à la mesure de la vitesse du vent. Il n’existe actuellement pas sur le marché de solution de mesure du vent par des moyens optiques à faible coût. L’objectif de cette thèse est de développer un tel prototype, en se basant sur le principe de la rétroinjection optique. Les différentes solutions d’anémométrie existant actuellement sont étudiées (anémométrie à coupelles, à ultrasons et à fil chaud, sondes de Pitot, PIV/PTV, sodars et lidars), avec un bref descriptif des avantages et inconvénients de chacune d’entre elles. Les équations de fonctionnement d’un laser soumis à rétroinjection optique sont redémontrées dans cette thèse. Les expressions résultantes sont des équations différentielles non linéaires et à retard, qui peuvent être réduites en un modèle statique couramment utilisé dans la littérature. Ce modèle prévoit une variation périodique de la puissance du laser pour un déplacement à vitesse constante de la cible responsable de la rétroinjection. Pour une puissance réinjectée suffisamment grande, ce modèle prévoit des discontinuités dans la puissance du laser. Nous développons un nouveau modèle issu des équations complètes linéarisées, qui permet de décrire le comportement dynamique du laser. Ce modèle prévoit notamment la présence d’oscillations amorties lors des discontinuités du modèle statique. Les caractéristiques de ces oscillations sont liées à la distance et au coefficient de réflexion de la cible. Les prédictions de ce modèle ont été vérifiées expérimentalement, et les résultats en ont été publiés dans la revue Optics Letters. Le corps de cette thèse se concentre sur l’acquisition et le traitement du signal de self-mixing, issu du passage de particules portées par le vent dans le faisceau de la diode laser utilisée. Comme la fréquence du signal est proportionnelle à la vitesse de la particule projetée sur l’axe optique du laser, nous avons mis en place un traitement dans le domaine fréquentiel par transformée de Fourier discrète. La ongueur de la transformée à utiliser est un compromis dicté par la recherche d’un rapport signal-sur-bruit optimal, le temps d’interaction de la particule avec le faisceau, et les ressources disponibles pour les calculs. Après avoir fixé ce compromis, nous calculons la fréquence de fausses détections qui en résulte. Nous étudions le biais qu’introduisent ces fausses détections sur la mesure de vitesse, ainsi qu’un algorithme permettant de compenser ce biais. Nous étudions ensuite les configurations optiques permettant de mesurer la vitesse du vent dans le plan horizontal (donnée qui intéresse les acheteurs potentiels du produit). Nous démontrons qu’il est nécessaire d’utiliser au moins quatre têtes optiques pour obtenir une acquisition fiable du signal. Des essais réalisés en soufflerie indiquent que le capteur mesure effectivement la vitesse du vent qui lui est présenté. Un démonstrateur autonome avec une unique voie de mesure a été monté sur un mât de prospection éolienne. Les mesures en résultant indiquent que le capteur est sensible à la température ambiante. Après correction par rapport à la température, la mesure effectuée est bien corrélée à une mesure de référence par un anémomètre et une girouette. Cette thèse a donc permis de développer un démonstrateur autonome permettant de mesurer la vitesse du vent en utilisant la rétroinjection optique, en conditions extérieures
In this thesis, we study the homodyne detection (or self-mixing) applied to wind speed measurements. At the moment, there is no commercially available optical anemometer with a low price point. The objective of this thesis is to develop such a prototype, which will be using the self-mixing phenomenon. Existing anemometers are studied, with a short comparison of advantages and drawbacks of each solution (cup, ultra-sonic and hot-wire anemometers, Pitot probes, PIV/PTV, sodars and lidars). The equations describing the behavior of a self-mixing laser are demonstrated in this thesis. The resulting expressions are nonlinear delayed differential equations. These equations can be reduced to a static model that is commonly used in the relevant literature. This model predicts a periodic variation of the laser power for a linear displacement of the target responsible for self-mixing. If the reflection coefficient of the target is big enough, this model predicts discontinuities in the laser power. We develop a new model from the complete equations. This new model allows for the study of the dynamical behavior of the laser. It notably predicts damped oscillations where the static model presents discontinuities. The characteristics of these oscillations are related to the distance of the target and its reflectivity. The predictions of this new model were confirmed experimentally, and the corresponding results were published in the Optics Letters journal. The main part of this thesis is focused on the acquisition and processing of the self-mixing signal, which is produced by particles carried by the wind in the laser beam. The frequency of the resulting signal is proportional to the speed of the particle projected onto the optical axis. Therefore, we use a discrete Fourier transform to study the signal in the frequency domain. The length of the Fourier transform is a compromise between the necessity of an optimal signal-to-noise ratio that can trigger the detection, the interaction time between the particle and the beam, and the resources available for computing. After choosing the right compromise, we compute the resulting false detection frequency. We study the bias arising from these false detections, and we create an algorithm that can be used to compensate this bias. Finally, we study the optical configurations that allows for the measurement of wind speed in the horizontal plane (it is this data that is interesting for the potential clients). We demonstrate that at least four optical heads are necessary to obtain a reliable acquisition. The tests conducted in a wind tunnel show that the sensor actually measures the wind speed. An autonomous demonstrator with one measuring channel has been put on a measuring mast. The resulting measurements show that the sensor is temperature sensitive. When the measurements are corrected against the temperature, they are well correlated to a reference measurement made by a cup anemometer and a wind vane. This thesis has led to the development of an autonomous demonstrator that measures the wind speed by self-mixing in a laser diode, in outdoor conditions
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Smith, Christina Lynn. "Analysis of mixing layer heights inferred from radiosonde, wind profiler, airborne lidar, airborne microwave temperature profiler, and in-situ aircraft data during the Texas 2000 air quality study in Houston, TX". Texas A&M University, 2003. http://hdl.handle.net/1969.1/2300.

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The mixing layer (ML) heights inferred from radiosondes, wind profilers, airborne lidar, airborne microwave temperature profiler (MTP), and in-situ aircraft data were compared during the Texas 2000 Air Quality Study in the Houston area. The comparisons and resulting good agreement between the separate instruments allowed for the spatial and temporal evolution of the ML height distribution to be determined across the Houston area on September 1, 2000. A benchmark method was created for determining ML heights from radiosonde data. The ML heights determined using this method were compared to ML heights determined using wind profiler data. The airborne lidar and MTP heights were also compared to the wind profiler heights. This was the first time the MTP was used for estimating ML heights. Because of this, the MTP heights were also compared to the ML heights determined by in-situ aircraft data. There was good agreement between the ML estimates when the instruments were co-located. The comparisons between the benchmark method and the wind profilers were independent of the quality of the profiler heights. The statistics for lidar and the wind profilers were better for the inland profiler comparisons. Even so, the results for coastal profilers were similar to the other comparisons. The results between the MTP and the wind profilers were comparable with the results found between the other instruments, and better, in that the statistics were similar for the both the inland and coastal profilers. The results between the MTP and in-situ aircraft data provided additional support for the use of MTP for determining ML heights. The combination of the inland and coastal wind profilers with the airborne instruments provided adequate information for the spatial and temporal evolution of the ML height to be determined across the Houston area on September 1, 2000. By analyzing the ML height distribution, major features were evident. These features included the shallow ML heights associated with the marine air from Galveston Bay and the Gulf of Mexico, and the sharp gradient of increasing ML heights north of Houston associated with the variation in the inversion depth found on this day.
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Arnqvist, Johan. "Strömningen i och över en skog : utvärdering av en 'mixing-layer' hypotes". Thesis, Uppsala University, LUVAL, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-105408.

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A new theory for predicting the windprofile over a canopy has been evaluated. The theory was first presented by Harman and Finnigan (2007). The theory relies on the forming of a mixing-layer above the canopy, due to different mean wind in and above the canopy. Characteristics from both mixing-layer and Monin Obukhov similarity theory have been used to develop the governingequations that give the wind profile. The theory has been used to calculate wind profiles for sixdifferent atmospheric stabilities. In order to evaluate the theory, profiles from the theory have beencompared to measurements from Jädraås forest, Sweden. Profiles from Monin Obukhov similarity theory were also used for comparison.In general the mixing-layer theory gives better results than Monin Obukhov similarity theory. Agreement with measurements is good in neutral conditions, but fails when the atmospheric stability is altered, especially in convective conditions. This is believed to be due to the canopy lacking in thickness. The mean wind speed is systematically underestimated and this is also believed to be caused by insufficient thickness of the canopy. A correction for this behaviour is proposed. The theory gives higher values of the mean wind speed in convective conditions with the correction and the calculated values of mean wind speed are closer to the measurements.

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Nilsson, Erik Olof. "Fluxes and Mixing Processes in the Marine Atmospheric Boundary Layer". Doctoral thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-195875.

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Atmospheric models are strongly dependent on the turbulent exchange of momentum, sensible heat and moisture (latent heat) at the surface. Oceans cover about 70% of the Earth’s surface and understanding the processes that control air-sea exchange is of great importance in order to predict weather and climate. In the atmosphere, for instance, hurricane development, cyclone intensity and track depend on these processes. Ocean waves constitute an obvious example of air-sea interaction and can cause the air-flow over sea to depend on surface conditions in uniquely different ways compared to boundary layers over land. When waves are generated by wind they are called wind sea or growing sea, and when they leave their generation area or propagate faster than the generating wind they are called swell. The air-sea exchange is mediated by turbulent eddies occurring on many different scales. Field measurements and high-resolution turbulence resolving numerical simulations have here been used to study these processes. The standard method to measure turbulent fluxes is the eddy covariance method. A spatial separation is often used between instruments when measuring scalar flux; this causes an error which was investigated for the first time over sea. The error is typically smaller over ocean than over land, possibly indicating changes in turbulence structure over sea. Established and extended analysis methods to determine the dominant scales of momentum transfer was used to interpret how reduced drag and sometimes net upward momentum flux can persist in the boundary layer indirectly affected by swell. A changed turbulence structure with increased turbulence length scales and more effective mixing was found for swell. A study, using a coupled wave-atmosphere regional climate model, gave a first indication on what impact wave mixing have on atmosphere and wave parameters. Near surface wind speed and wind gradients was affected especially for shallow boundary layers, which typically increased in height from the introduced wave-mixing. A large impact may be expected in regions of the world with predominant swell. The impact of swell waves on air-sea exchange and mixing should be taken into account to develop more reliable coupled Earth system models.
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Fong, Derek Allen. "Dynamics of freshwater plumes: observations and numerical modeling of the wind-forced response and alongshore freshwater transport". Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/58510.

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Abstract (sommario):
Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988.
Includes bibliographical references (leaves 163-172).
A freshwater plume often forms when a river or an estuary discharges water onto the continental shelf. Freshwater plumes are ubiquitous features of the coastal ocean and usually leave a striking signature in the coastal hydrography. The present study combines both hydrographic data and idealized numerical simulations to examine how ambient currents and winds influence the transport and mixing of plume waters. The first portion of the thesis considers the alongshore transport of freshwater using idealized numerical simulations. In the absence of any ambient current, the downstream coastal current only carries a fraction of the discharged fresh water; the remaining fraction recirculates in a continually growing "bulge" of fresh water in the vicinity of the river mouth. The fraction of fresh water transported in the coastal current is dependent on the source conditions at the river mouth. The presence of an ambient current augments the transport in the plume so that its freshwater transport matches the freshwater source. For any ambient current in the same direction as the geostrophic coastal current, the plume will evolve to a steady-state width. A key result is that an external forcing agent is required in order for the entire freshwater volume discharged by a river to be transported as a coastal current. The next section of the thesis addresses the wind-induced advection of a river plume, using hydrographic data collected in the western Gulf of Maine. The observations suggest that the plume's cross-shore structure varies markedly as a function of fluctuations in alongshore wind forcing. Consistent with Ekman dynamics, upwelling favorable winds spread the plume offshore, at times widening it to over 50 km in offshore extent, while downwelling favorable winds narrow the plume width to a few Rossby radii. Near-surface current meters show significant correlations between cross-shore currents and alongshore wind stress, consistent with Ekman theory. Estimates of the terms in the alongshore momentum equation calculated from moored current meter arrays also indicate an approximate Ekman balance within the plume. A significant correlation between alongshore currents and alongshore wind stress suggests that interfacial drag may be important. The final section of the thesis is an investigation of the advection and mixing of a surface-trapped river plume in the presence of an upwelling favorable wind stress, using a three-dimensional model in a simple, rectangular domain. Model simulations demonstrate that the plume thins and is advected offshore by the cross shore Ekman transport. The thinned plume is susceptible to significant mixing due to the vertically sheared horizontal currents. The first order plume response is explained by Ekman dynamics and a Richardson number mixing criterion.
by Derek Allen Fong.
Ph.D.
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Libri sul tema "Wind mixing"

1

Bell, James H. Design and calibration of the mixing layer and wind tunnel. Stanford, Calif: Stanford University, Dept. of Aeronautics and Astronautics, 1989.

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2

Dembowski, Mary Ann. An evaluation of parameters influencing jet mixing using the WIND Navier-Stokes Code. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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3

Long, Andrew J. Groundwater flow, quality (2007-10), and mixing in the Wind Cave National Park area, South Dakota. Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2012.

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4

Meier, Frank. Artistry of mixing drinks. New York: Mud Puddle Books, 2009.

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J, Georgiadis Nicholas, e NASA Glenn Research Center, a cura di. An evaluation of parameters influencing jet mixing using the WIND Navier-Stokes Code. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Ehud, Gartenberg, Roberts A. Sidney e Langley Research Center, a cura di. Investigation of ramp injectors for supersonic mixing enhancement. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1994.

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E, Gartenberg, Roberts A. S e Langley Research Center, a cura di. Investigation of ramp injectors for supersonic mixing enhancement. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1994.

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8

United States. National Aeronautics and Space Administration., a cura di. Investigation of mixing a supersonic stream with the flow downstream of a wedge: NCC2-5190 final report. [Washington, DC: National Aeronautics and Space Administration, 1997.

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9

Investigation of mixing a supersonic stream with the flow downstream of a wedge: NCC2-5190 final report. [Washington, DC: National Aeronautics and Space Administration, 1997.

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United States. National Aeronautics and Space Administration., a cura di. Global ultraviolet imager (GUVI) investigation: Period of performance, 08 Nov 1993 through 07 Dec 1994 : GUVI final report. [Washington, DC: National Aeronautics and Space Administration, 1995.

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Capitoli di libri sul tema "Wind mixing"

1

Breitschwerdt, D., e F. D. Kahn. "Turbulent Mixing in Wind-Blown HII Regions". In Kinematics and Dynamics of Diffuse Astrophysical Media, 297–301. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0926-0_48.

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2

Sheng, Y. Peter. "Modeling Wind-Induced Mixing and Transport in Estuaries and Lakes". In Estuarine Water Quality Management, 41–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-75413-5_5.

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3

Zahn, J. P. "Lithium Depletion in Late-Type Stars Through Wind-Driven Mixing". In Highlights of Astronomy, 461–62. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-010-9374-3_79.

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4

Sheng, Y. Peter. "Modeling wind-induced mixing and transport in estuaries and lakes". In Estuarine Water Quality Management Monitoring, Modelling and Research, 41–48. Washington, D. C.: American Geophysical Union, 1990. http://dx.doi.org/10.1029/ce036p0041.

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5

Mills, D., N. D. Adamo, A. Wyllie e A. Pearce. "The response of stratified shelf waters to the Leeuwin Current and wind forcing: Winter observations off Perth, Western Australia". In Mixing in Estuaries and Coastal Seas, 5–28. Washington, D. C.: American Geophysical Union, 1996. http://dx.doi.org/10.1029/ce050p0005.

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Jove, Esteban, Héctor Aláiz-Moretón, José Luis Casteleiro-Roca, Emilio Corchado e José Luis Calvo-Rolle. "Modeling of Bicomponent Mixing System Used in the Manufacture of Wind Generator Blades". In Intelligent Data Engineering and Automated Learning – IDEAL 2014, 275–85. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10840-7_34.

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Emeis, Stefan. "Derivation of Vertical Wind and Turbulence Profiles, the Mixing-Layer Height, and the Vertical Turbulent Exchange Coefficient from Sodar and Ceilometer Soundings in Urban Measurement Campaigns". In Meteorological and Air Quality Models for Urban Areas, 133–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00298-4_13.

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Ødegaard, Knut Jørgen Røed. "Chemical Evolution and Mixing Processes in Massive Stars". In Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution, 322–23. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0205-6_73.

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9

Staritsin, E. I. "Semiconvection Mixing and its Influence on Case B Mass Exchange in Massive Binaries". In Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution, 324–25. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0205-6_74.

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10

Oughton, S., e W. H. Matthaeus. "EVOLUTION OF SOLAR WIND FLUCTUATIONS AND THE INFLUENCE OF TURBULENT ‘MIXING’". In Solar Wind Seven, 523–26. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-042049-3.50109-5.

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Atti di convegni sul tema "Wind mixing"

1

Webb, G. M., A. Zakharian e G. P. Zank. "Wave mixing of magnetohydrodynamic waves". In The solar wind nine conference. AIP, 1999. http://dx.doi.org/10.1063/1.58836.

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2

Webb, G. M., J. F. McKenzie, G. P. Zank e Q. Hu. "Alfvén wave mixing in the solar wind". In SOLAR WIND 13: Proceedings of the Thirteenth International Solar Wind Conference. AIP, 2013. http://dx.doi.org/10.1063/1.4810995.

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Lignarolo, Lorenzo, Daniele Ragni, Carlos Simao Ferreira e Gerard van Bussel. "Turbulent mixing in wind turbine and actuator disc wakes: experiments and POD analysis". In 33rd Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0223.

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Ruderman, M. S., M. L. Goldstein, D. A. Roberts, A. Deane e L. Ofman. "Alfvén wave phase mixing driven by velocity shear in two dimensions". In The solar wind nine conference. AIP, 1999. http://dx.doi.org/10.1063/1.58808.

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5

Krallis, George A., e Richard N. Weisman. "Hydrodynamic Classification of Wind-Induced Mixing". In Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000. Reston, VA: American Society of Civil Engineers, 2000. http://dx.doi.org/10.1061/40517(2000)421.

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Parhi, S., S. T. Suess e M. Sulkanen. "The generation of smooth high speed solar wind from plume-interplume mixing". In The solar wind nine conference. AIP, 1999. http://dx.doi.org/10.1063/1.58670.

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Kaghashvili, Edisher Kh. "Linear mechanism of Alfvén wave dissipation induced by velocity shear: Phase mixing and damping". In The solar wind nine conference. AIP, 1999. http://dx.doi.org/10.1063/1.58768.

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Zitny, Brett, e Tyson Deklavs. "Mass Soil Mixing for Wind Tower Turbine Foundations". In IFCEE 2015. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479087.160.

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Topolnicki, Michał, e Grzegorz Soltys. "Novel Application of Wet Deep Soil Mixing for Foundation of Modern Wind Turbines". In Proceedings of the Fourth International Conference on Grouting and Deep Mixing. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412350.0039.

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Jensen, Kaare H. "Poster: Pollen, Water, and Wind - Chaotic mixing in a puddle of water". In 68th Annual Meeting of the APS Division of Fluid Dynamics. American Physical Society, 2015. http://dx.doi.org/10.1103/aps.dfd.2015.gfm.p0014.

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Rapporti di organizzazioni sul tema "Wind mixing"

1

Sullivan, Peter P., e James C. McWilliams. High Wind Upper Ocean Mixing with Explicit Surface Wave Processes. Fort Belvoir, VA: Defense Technical Information Center, settembre 2010. http://dx.doi.org/10.21236/ada542495.

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Oakey, Neil S. Horizontal Variability in Surface Mixing in Response to Wind Forcing. Fort Belvoir, VA: Defense Technical Information Center, settembre 1997. http://dx.doi.org/10.21236/ada629422.

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Thomas, Leif N. Isopycnal Transport and Mixing of Tracers by Submesoscale Flows Formed at Wind-Driven Ocean Fronts. Fort Belvoir, VA: Defense Technical Information Center, settembre 2009. http://dx.doi.org/10.21236/ada531794.

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Thomas, Leif N. 2010 Annual Report for Project on Isopycnal Transport and Mixing of Tracers by Submesoscale Flows Formed at Wind-Driven Ocean Fronts. Fort Belvoir, VA: Defense Technical Information Center, settembre 2010. http://dx.doi.org/10.21236/ada542824.

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Thomas, Leif N. 2012 Annual Report for Project on Isopycnal Transport and Mixing of Tracers by Submesoscale Flows Formed at Wind-Driven Ocean Fronts. Fort Belvoir, VA: Defense Technical Information Center, settembre 2012. http://dx.doi.org/10.21236/ada590697.

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Thomas, Leif N. 2013 Annual Report for Project on Isopycnal Transport and Mixing of Tracers by Submesoscale Flows Formed at Wind-Driven Ocean Fronts. Fort Belvoir, VA: Defense Technical Information Center, settembre 2013. http://dx.doi.org/10.21236/ada601426.

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