56
56
May 30, 2013
05/13
by
DJAMH
audio
eye 56
favorite 0
comment 0
TIDAL - Global Frontiers Seba - Dangerous Days Alaska - KODIAK Alaska - Celsius Bassflo - M Theory Celldweller - I'm Afraid This Time (Remix) TIDAL - IMPRESSIONS TIDAL - Deep trip Bassflo - Poseidon Bassflo - Hypersleep Alaska - DENALI'S REALM
Topics: Bass'Flo, Advection Agency, 2011
In this paper, some recent developments in the analysis of the BMO space have been applied to the advection dispersion equation. Then the upper and lower bound have been obtained for the concentration and dispersion coefficient of the advection dispersion equation under the conditions where source term and stirring term of advection dispersion equation belong to BMO space.
Topics: Advection Dispersion Equation, BMO, Dispersion Coefficient
283
283
May 6, 2010
05/10
by
Jiusto, J. E
texts
eye 283
favorite 0
comment 0
Fog - radiation, advection and air mass fog - vertical distribution, growth rate and control concept
Topics: ADVECTION, RADIATION, VERTICAL DISTRIBUTION, AIR MASSES, FOG, FOG DISPERSAL, RADIATION, RAINDROPS,...
Mendeley Climate Change Library
21
21
Jul 6, 2019
07/19
by
Yuan Li; Jianjun Jia; Qingguang Zhu; Peng Cheng; Shu Gao; Ya Ping Wang
texts
eye 21
favorite 0
comment 0
Suspended sediment concentration (SSC) has a significant impact on the estuarine environment and its morphological evolution. At any given location, the temporal variability of depth-averaged SSC is due to a combination of two processes: horizontal advection and local resuspension. In this study, we investigated the sediment dynamics at three anchored monitoring stations close to the maximum turbidity zone of the Changjiang Estuary, and developed a box model to differentiate the effects of...
Topics: Advection, Box model, Changjiang Estuary, Resuspension, Suspended sediment
20
20
Sep 3, 2019
09/19
by
Mathematical Journal of Interdisciplinary Sciences
texts
eye 20
favorite 0
comment 0
Mathematical Journal of Interdisciplinary Sciences Vol.7, No.1
Topic: Advection Dispersion Convergence-control parameter Discrete squared residual
Natural decay of pollutants is rarely consider in mass transport equation. This paper develops a mathematical model of a filter based on iron oxide coated sand for the removal of chromium in groundwater and surface water. The natural decay of chromium was analyzed using a zero order decay reaction. The advection dispersion equation for this purpose is solved analytically using the Laplace transform method and numerically by the Fourth order Runge kutta method to determine the spatio-temporal...
Topics: Filter, Sand, Iron oxide, Chromium, Adsorption, advection-dispersion, Laplace.
629
629
May 28, 2011
05/11
by
Paliwoda, L
texts
eye 629
favorite 0
comment 0
This document contains the procedure and the test results of the Advanced Microwave Sounding Unit-A (AMSU-A) Earth Observing System (EOS) Project, assembly part number 1356008-1, serial number 202, Electromagnetic Interference (EMI) and Electromagnetic Susceptibility (EMC) qualification test. The test was conducted in accordance with the approved EMI/EMC Test Plan/Procedure, Specification number AE-26151/8B, dated 10 September 1998. Aerojet intends that the presentation and submittal of this...
Topics: VORTICITY, ATMOSPHERIC GENERAL CIRCULATION MODELS, LAGRANGIAN FUNCTION, ADVECTION, NONLINEARITY,...
65
65
Oct 5, 2016
10/16
by
International Journal of Engineering Research & Science (IJOER)
texts
eye 65
favorite 0
comment 0
Abstract — A direct simulation investigations of contaminant transport has been conducted. The simulations are based on the unsteady longitudinal advection diffusion contaminant decay equation, which is discretized using finite element Galerkin’s method with backward difference time formulation with the application of COMSOL Multiphysics Software Package. It was observed that the simulation results, which are illustrated pictorially via line graphs and contours, consistently represented the...
Topics: Advection, COMSOL Multiphysics, Contaminant decay, Dispersion, Pollution, Time-dependent sources.
157
157
May 27, 2011
05/11
by
Jewitt, Davi
texts
eye 157
favorite 0
comment 0
The aim of this proposal was to analyse a set of charge-coupled device images of the Jupiter-impacting comet D/Shoemaker-Levy 9. The images were obtained primarily using the University of Hawaii 2.2-m telescope and a standardized imaging device, providing an unusually uniform set of data. Additional data included a set of spectra taken in search of gaseous emission from SL9 using the UH 2.2-m and Keck 10-m telescopes.
Topics: ANNUAL VARIATIONS, CARBON, PARTICULATES, SARGASSO SEA, DIFFUSION, ADVECTION, ESTIMATES, OXYGEN,...
This effort is closely linked with our effort on ONR grant N00014-05-1-0092 and is a component of the Optimal Deployment of Drifting Acoustic Sensors, ODDAS. We collaborate with A. C. Poje of CUNY SI; S. Riedlinger and R. Allard at NRL SSC; D. Hammond at Advanced Avionics; and D. Porter and R. Heitsenrether at APL/JHU. The long-term goal of ODDAS is to develop strategies for the deployment of drifting sensors that maximize the amount of environmental information collected with the fewest...
Topics: DTIC Archive, DELAWARE UNIV NEWARK, *ACOUSTIC DETECTORS, ADVECTION, INSTRUMENTATION, OCEANOGRAPHIC...
133
133
Jun 1, 2011
06/11
by
Fucha, D
texts
eye 133
favorite 0
comment 0
Unduly high diving speeds can be effectively controlled by diving brakes but their employment involves at the same time a number of disagreeable features: namely, rotation of zero lift direction, variation of diviving moment, and, the creation of a potent dead air region.
Topics: SPACE-TIME CE/SE METHOD, BOUNDARY CONDITIONS, FLOW EQUATIONS, ADVECTION, SHOCK TUBES
In this study, a laboratory soil column experiment was carried out for estimating the dispersivity (?) in sandy loam soil by the inversion of the Advection-Dispersion Equation. An 89 cm deep and 15 cm diameter cylindrical column was filled with sandy loam soil in such a way that the bulk density of the soil in field condition was strictly satisfied in the column. Potassium bromide was used as the conservative tracer in the study. The tracer concentration was allowed to pass through the column...
Topics: Dispersivity: Advection Dispersion Equation, Effective dispersion coefficient, Laboratory soil...
251
251
May 27, 2011
05/11
by
Schneider, Harol
texts
eye 251
favorite 0
comment 0
This method is investigated for semi-infinite multiple-slab configurations of arbitrary width, composition, and source distribution. Isotropic scattering in the laboratory system is assumed. Isotropic scattering implies that the fraction of neutrons scattered in the i(sup th) volume element or subregion that will make their next collision in the j(sup th) volume element or subregion is the same for all collisions. These so-called ''transfer probabilities'' between subregions are calculated and...
Topics: BOLTZMANN TRANSPORT EQUATION, HYDRODYNAMICS, MODELS, NAVIER-STOKES EQUATION, NONLINEARITY,...
21
21
texts
eye 21
favorite 0
comment 0
Abstract — Stochastic advection diffusion equation (SADE) with multiplicative stochastic input is a practical mathematical model for different physical phenomena. In this paper, SADE will be studied using two spectral stochastic techniques. The first is the Wiener chaos expansion (WCE) technique and the second is the Wiener-Hermite expansion with perturbation (WHEP) technique. These techniques convert the SADE into a system of deterministic partial differential equation (DPDE) that can be...
Topics: Advection diffusion equation, Multiplicative random input, Wiener-Hermite expansion, Wiener-Chaos...
4
4.0
Sep 7, 2020
09/20
by
Murat Sari, Sufii H. Mussa, Huseyin Tunc
texts
eye 4
favorite 0
comment 0
This paper presents a highly accurate finite difference based scheme through the Pad´e approximation in analyzing the behaviour of the nonlinear advection-diffusion processes governed by the unsteady Burgers equation. It has then been proved that the present method is unconditionally stable based on the von Neumann stability analysis. The proposed approach has been shown to be capable of solving the model equation effectively. Two challenging examples have been taken to illustrate the physical...
Topics: Nonlinear advection diffusion process, Compact finite difference method, Nonlinear modelling,...
249
249
May 31, 2011
05/11
by
Otterman, J.; Walczewski, J., et al; Ardizzone, J.; Atlas, R.; Bungato, D.; Cierniewski, J.; Jusem, J. C.; Przybylak, R.; Schubert, S.; Starr, D.
texts
eye 249
favorite 0
comment 0
The aim of this paper is to report extreme winter/early-spring air temperature (hereinafter temperature) anomalies in mid-latitude Europe, and to discuss the underlying forcing to these interannual fluctuations. Warm advection from the North Atlantic in late winter controls the surface-air temperature, as indicated by the substantial correlation between the speed of the surface southwesterlies over the eastern North Atlantic (quantified by a specific Index Ina) and the 2-meter level air...
Topics: COMPUTATIONAL FLUID DYNAMICS, TEXTURES, THREE DIMENSIONAL MODELS, FLOW VISUALIZATION, FLOW...
In this section we define a measure of mixing that does not necessarily require diffusion to measure the amount of homogenization that occurs during the mixing process.
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *FLUID DYNAMICS, ADVECTION, DIFFUSION,...
We have two major goals. The first is to improve our capabilities and scientific knowledge concerning Lagrangian predictability in the ocean. Specific applications include search and rescue operations, the design of float and drifter experiments, and the understanding of stirring mechanisms. The second goal is to develop methods allowing the assessment of the underlying dynamics and predictability of complex physical systems in the ocean based solely on the analysis of time-series.
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *OCEANS, *PREDICTIONS, *WATER FLOW,...
High surface winds over California and the bordering Pacific Ocean resulted in the death of one man and the loss of power to approximately 50,000 residences across the state. These damaging winds are hypothesized to result from an upper level front and associated tropopause folding that rapidly intensify as they move south across the region, causing high momentum air to be transported to the lower troposphere. Once the high momentum air reaches the top of the planetary boundary layer, the...
Topics: Tropopause, Upper-level frontogenesis, Tropopause folding, Jet-streak, Cold-air advection, Shear,...
The cross-shore exchange of material is examined on beaches of varying morphology and hydrodynamics. On a dissipative, rip-channeled beach in Monterey, California, field measurements of the rip current vertical structure reveal depth-uniform flows inside the surf zone, and surface-dominated flows with rotation over depth outside the surf zone. Aperiodic, very low frequency pulsations in the near-surface velocity were found to control the mean rip current flow. Observations of Lagrangian surface...
Topics: Eulerian, Lagrangian, advection, diffusion, dispersion, drifters, dye, mixing, rip current, steep...
243
243
Jun 9, 2011
06/11
by
Carle, Alan; Fagan, Mike; Green, Lawrence L
texts
eye 243
favorite 0
comment 0
This report describes preliminary results obtained using an automated adjoint code generator for Fortran to augment a widely-used computational fluid dynamics flow solver to compute derivatives. These preliminary results with this augmented code suggest that, even in its infancy, the automated adjoint code generator can accurately and efficiently deliver derivatives for use in transonic Euler-based aerodynamic shape optimization problems with hundreds to thousands of independent design...
Topics: DIFFUSION, TRIANGULATION, UPWIND SCHEMES (MATHEMATICS), FINITE VOLUME METHOD, ADVECTION,...
This is part of a collaborative program Optimal Deployment of Drifting Acoustic Sensors, ODDAS, which involves academic, private sector, and Navy scientists. The long-term goal of ODDAS is to develop strategies for the deployment of drifting sensors that maximize the amount of environmental information collected with the fewest sensors. The primary long-term goal of our component is to quantify oceanic submesoscale stirring and advective transport processes and to assess their roles in the...
Topics: DTIC Archive, DELAWARE UNIV NEWARK COLL OF MARINE AND EARTH STUDIES, *ACOUSTIC DETECTORS,...
One major issue in the accurate solution of convection-dominated problems by means of high-order methods is the ability of the solver to maintain monotonicity. This problem is critical for spectral elements, where Gibbs oscillations may pollute the solution. However, typical filter-based stabilization techniques used with spectral elements are not monotone. In this paper, residual-based stabilization methods originally derived for finite elements are constructed and applied to high-order...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF APPLIED MATHEMATICS, *COMPUTATION...
In this paper, spatially high-order Residual-Distribution (RD) schemes using the first-order hyperbolic system method are proposed for general time-dependent advection-diffusion problems. The corresponding second-order time-dependent hyperbolic advection-diffusion scheme was first introduced in [NASA/TM-2014-218175, 2014], where rapid convergences over each physical time step, with typically less than five Newton iterations, were shown. In that method, the time-dependent hyperbolic...
Topics: DTIC Archive, NATIONAL INST OF AEROSPACE ASSOCIATES HAMPTON VA, *ADVECTION, *DIFFUSION, *TIME...
In response to Air Weather Service requirements, the Air Force Geophysics Lab has been involved in research in the development of mesoscale advection fog prediction techniques. A two-dimensional fog prediction model developed at the Naval Environmental Prediction Research Facility (NEPRF) was selected for evaluation because it can operate on a mini-computer of the size planned for the Air Force's Automated Weather Distribution System (AWDS). Six case studies developed by Calspan Advanced...
Topics: DTIC Archive, Weyman,J, AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA, *FOG, MATHEMATICAL MODELS,...
The 1D PBL model has been substantially improved to incorporate vertical motion from GEMPAK grid files, so that vertical advection (subsidence) realistically affects PBL growth. The stable growth has been refined to ensure correct matching under PBL transitions from one regime to another.
Topics: DTIC Archive, Ruscher, Paul, FLORIDA STATE UNIV TALLAHASSEE DEPT OFMETEOROLOGY, *BOUNDARY LAYER,...
A velocity field. even one that represents a steady state flow implies a dynamical system. Animated velocity fields is an important tool in understanding such complex phenomena. This paper looks at a number of techniques that animate velocity fields and propose two new alternatives, These are texture advection and streamline cycling. The common theme among these techniques is the use of advection on some texture to generate a realistic animation of the velocity field. Texture synthesis and...
Topics: NASA Technical Reports Server (NTRS), VELOCITY DISTRIBUTION, ADVECTION, EQUILIBRIUM FLOW, CYCLES,...
This research presents a novel high-order space-time method for hyperbolic conservation laws. Two important concepts, the staggered space-time mesh of the space-time conservation element/solution element (CE/SE) method and the local discontinuous basis functions of the space-time discontinuous Galerkin (DG) finite element method, are the two key ingredients of the new scheme. The staggered space-time mesh is constructed using the cell-vertex structure of the underlying spatial mesh. The...
Topics: DTIC Archive, JACKSON STATE UNIV MS DEPT OF COMPUTER ENGINEERING, *DIFFERENTIAL GEOMETRY,...
Our ultimate goal is to understand the dynamics of strong, narrow ocean currents that persist for hundreds or thousands of kilometers, despite being in contact with the (frictional) bottom. Our immediate objective is to understand how vertical mixing and advection within the bottom boundary layer influence the three-dimensional structure, evolution, and dynamics of both the bottom boundary layer and the overlying (interior) flow.
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *OCEAN CURRENTS, ADVECTION, BOUNDARY LAYER,...
Two-dimensional simulations of the 11 January 1972 Boulder, Colorado, windstorm, obtained from 11 diverse nonhydrostatic models, are intercompared with special emphasis on the turbulent breakdown of topographically forced gravity waves, as part of the preparation for the Mesoscale Alpine Programme field phase. The sounding used to initialize the models is more representative of the actual lower stratosphere than those applied in previous simulations. Upper-level breaking is predicted by all...
Topics: DTIC Archive, NAVAL RESEARCH LAB MONTEREY CA, *GRAVITY WAVES, *STORMS, WIND, DISSIPATION,...
Marine fog forecasts during the summer period in the North Pacific are not made with any acceptable degree of accuracy. Objective fog development models exist and are used with some success for localized coastal regions of the western U.S.; scarcity of accurate data has hindered creation of a reliable open-ocean model. The Eulerian single-station approach, utilizing a segment of the complete accurate data of Ocean Weather Station Papa (50N,145W) is applied in the study to an objective marine...
Topics: Oceanography, Advection fog, Fog forecasting, Marine fog, North Pacific Ocean fog, Open-ocean fog,...
The core motivating ideas of the space-time CESE method are clearly presented and critically analyzed. It is explained why these ideas result in all the simplifying and enabling features of the CESE method. A thorough discussion of the a scheme, a two-level non-dissipative CESE solver of a simple advection equation with two independent mesh variables and two equations per mesh point is also presented. It is shown that the scheme possesses some rather intriguing properties such as: (i) its two...
Topics: NASA Technical Reports Server (NTRS), INVARIANCE, DISSIPATION, SIMPLIFICATION, TIME, SPACE,...
In this lecture we shall focus on the dynamics of individual phytoplankton cells and on simple models to describe their motion in the fluid flow. Phytoplankton cells are small with dimensions up to a few hundred microns. Individual phytoplankton cells immersed in water are advected by the surrounding flow, even though some species can resist passive advection by various means, such as varying their buoyancy and/or swimming. In addition most plankton cells are slightly heavier than water and are...
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *PHYTOPLANKTON, ADVECTION, BUOYANCY, CELLS,...
The goal of this report is to understand the convective process in the ocean, develop numerical models to study it, and so improve the representation of convection in ocean circulation models. To understand the relative importance of vertical mixing by convection and lateral advection by geostrophic eddies in setting the volume and properties of water-masses formed by intense winter storms blowing over the open ocean. The insights gained will inform and improve parametric representations of...
Topics: DTIC Archive, MASSACHUSETTS INST OF TECH CAMBRIDGE, *CONVECTION, *OCEAN MODELS, ADVECTION, MIXING,...
The work of Davis which imports the concept of total variation diminution (TVD) into non-upwinded, Lax-Wendroff type schemes is reformulated in a way which is easier to analyze. The analysis reveals a class of TVD schemes not observed by Davis. Only the case of one dimensional linear advection is treated.
Topics: NASA Technical Reports Server (NTRS), ADVECTION, ALGORITHMS, TVD SCHEMES, FINITE DIFFERENCE THEORY,...
The long-term goal is to improve our capabilities and scientific knowledge concerning Lagrangian predictability in the ocean. Specific applications include search and rescue operations, the design of float and drifter experiments, and the understanding of stirring mechanisms. The objectives are: 1) To identify robust geometrical structures that help distinguish regions of inherent unpredictability (Lagrangian chaos) from predictable (regular) regions. 2) Also, to identify geographical regions...
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *COMPUTATIONAL FLUID DYNAMICS, *OCEAN...
The funded period of this project ran out on 30 November 2007; a no-cost extension of 3 months was requested by the PI for medical reasons, and was granted. In the second year the effort addressed the following issues: (1) making the Recovery-based Discontinuous Galerkin method (RDG) suitable for multidimensional applications, (2) increasing its efficiency by constructing the recovery basis once as pre-processing step for an entire calculation, (3) the combination of RDG with upwind DG for...
Topics: DTIC Archive, van Leer, Bram, MICHIGAN UNIV ANN ARBOR, *DIFFUSION, *DISCONTINUITIES, *GALERKIN...
This technical note discusses three advection patterns favorable for freezing precipitation. Two graphs were developed based on 503 freezing precipitation occurrences during the past 11 years- a 1000- to 500-mb thickness graph and an 850-mb temperature graph. Two anticyclonic pressure patterns are discussed throughout the technical note. Relationships between inverted troughs and 850-mb lows are presented. Considerable discussion on synoptic patterns across the continental United States is...
Topics: DTIC Archive, Weber, Eugene M., AIR FORCE WEATHER AGENCY OFFUTT AFB NE, *SYNOPTIC METEOROLOGY,...
196
196
Jun 17, 2010
06/10
by
Pogosyan, Kh. P
texts
eye 196
favorite 0
comment 0
Tropospheric influence on temperature fields, circulation, and convection currents in stratosphere
Topics: ADVECTION, STRATOSPHERE, TEMPERATURE FIELD, TROPOSPHERE, ATMOSPHERIC CIRCULATION, ATMOSPHERIC...
Hybrid Eulerian-Lagrangian semi-implicit time-integrators (HELSI) are presented which use the standard semi-implicit formulation as their starting point. The advantage of such an approach is that existing models which employ Eulerian semi-implicit time-integrators can easily be augmented to use the HELSI approach, that is, provided that either: a series of advection problems can be solved efficiently as in the operator-integration-factor splitting (OIFS) method or that the grid and underlying...
Topics: DTIC Archive, NAVAL RESEARCH LAB MONTEREY CA, *LAGRANGIAN FUNCTIONS, *EULER EQUATIONS,...
For advection schemes based on fluctuation splitting, a design criterion of optimizing the time step leads to linear schemes that coincide with those designed for least truncation error. A further stage of optimizing the time step using a nonlinear positivity criterion, leads to considerable further gains in resolution.
Topics: NASA Technical Reports Server (NTRS), ADVECTION, COMPUTATIONAL GRIDS, NONLINEARITY, THEOREM...
260
260
texts
eye 260
favorite 0
comment 0
As proposed in the above OAI/NASA Glenn Research Center (GRC) Co-Operative Agreement the objective of the work was to provide consultation and assistance to the NASA GRC GTX Rocket Based Combined Cycle (RBCC) Program Team in planning and developing requirements, scale model concepts, and plans for an experimental nozzle research program. The GTX was one of the launch vehicle concepts being studied as a possible future replacement for the aging NASA Space Shuttle, and was one RBCC element in the...
Topics: TRANSPORT THEORY, TIME DEPENDENCE, WALL FLOW, COMPUTATIONAL FLUID DYNAMICS, HAMILTON-JACOBI...
In this lecture we will try to understand local or Lagrangian theories involved in mixing of passive scalars. This involves solving the advection-diffusion (AD) equation along fluid trajectories. The origins of these local theories can be traced to Batchelor's idea of describing the flow via spatially-constant strain-rate matrices with prescribed time dependence. Kraichnan addressed the problem next by considering the velocity field in the AD equation to be a stochastic Gaussian field with a...
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *FLUID MECHANICS, *MIXING, ADVECTION,...
The long-term goal is to understand the convective process in the ocean, develop numerical models to study it, and so improve the representation of convection in ocean circulation models.
Topics: DTIC Archive, MASSACHUSETTS INST OF TECH CAMBRIDGE, *CONVECTION, *OCEAN MODELS, ADVECTION, DEEP...
This report details calculations for the McDonnell-Douglas 30P/30N and the NHLP-2D three-element highlift configurations. Calculations were performed with the Reynolds averaged Navier-Stokes code ISAAC to study the effects of various numerical issues on high lift predictions. These issues include the effect of numerical accuracy on the advection terms of the turbulence equations, Navier-Stokes versus the thin-layer Navier-Stokes approximation, an alternative formulation of the production term,...
Topics: NASA Technical Reports Server (NTRS), TURBULENCE MODELS, AIRFOILS, REYNOLDS AVERAGING,...
This work represents a part of a project to develop an atmospheric general circulation model based on the semi-Lagrangian advection of potential vorticity (PC) with divergence as the companion prognostic variable.
Topics: NASA Technical Reports Server (NTRS), VORTICITY, ATMOSPHERIC GENERAL CIRCULATION MODELS, LAGRANGIAN...
A velocity field, even one that represents a steady state flow, implies a dynamical system. Animated velocity fields is an important tool in understanding such complex phenomena. This paper looks at a number of techniques that animate velocity fields and propose two new alternatives. These are texture advection and streamline cycling. The common theme among these techniques is the use of advection on some texture to generate a realistic animation of the velocity field. Texture synthesis and...
Topics: NASA Technical Reports Server (NTRS), TWO DIMENSIONAL FLOW, VELOCITY DISTRIBUTION, ADVECTION,...
An advective mixed layer ocean model was developed by eliminating the assumption of horizontal homogeneity in an already existing mixed layer model, and then superimposing a mean and anomalous wind driven current field. This model is based on the principle of conservation of heat and mechanical energy and utilizes a box grid for the advective part of the calculation. Three phases of experiments were conducted: evaluation of the model's ability to account for climatological sea surface...
Topics: NASA Technical Reports Server (NTRS), ADVECTION, MATHEMATICAL MODELS, PREDICTIONS, SEAS, SURFACE...
In this paper, we construct very efficient high-order schemes for general time-dependent advection diffusion problems, based on the first-order hyperbolic system method. Extending the previous work on the second-order time-dependent hyperbolic advection diffusion scheme (Mazaheri and Nishikawa, NASA/TM-2014-218175, 2014), we construct third-, fourth-, and sixth-order accurate schemes by modifying the source term discretization. In this paper, two techniques for the source term discretization...
Topics: DTIC Archive, NATIONAL INST OF AEROSPACE ASSOCIATES HAMPTON VA, *NONLINEAR SYSTEMS, *TIME...
The long-term goal of this project is develop the capability to predict the origin and fate of ocean water particles. We believe that achieving this goal follows from quantification of the roles of sub-mesoscale stirring and advective transport on ocean dynamics. Spatial scales of interest range from one kilometer to the Rossby deformation scale with corresponding time scales ranging from minutes to days. We rely on synoptic currents from high-frequency (HF) radar and output from...
Topics: DTIC Archive, DELAWARE UNIV NEWARK COLL OF MARINE AND EARTH STUDIES, *PARTICLES, *SEA WATER,...
