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 40 for “"Lagrangian particle tracking"”.
-
Vision systems in agriculture – Lagrangian particle tracking and field robotics
… that utilize techniques in computer vision -- a Lagrangian particle tracking (LPT) system and a high-throughput phenotyping system. Both systems have important application in in agricultural engineering. Lagrangian particle tracking (LPT) enables investigation of turbulence in the Lagrangian …
-
Image-Based Modeling of Porous Media Using FEM and Lagrangian Particle Tracking
… and flow simulation in these systems and (2) nanoparticle (NP) transport modeling in porous media. These are briefly explained below. Rock fracturing, followed by proppant injection, has been used for years to improve oil and gas production rates in low permeability reservoirs and is now routinely …
-
Development of a scalable real-time Lagrangian particle tracking system for volumetric flow field characterization
Lagrangian particle tracking (LPT) is important for the study of turbulence and the inertial behavior of particles in natural and industrial flow fields. This work describes the development of a new scalable real-time LPT system which is able to track particles in large scale 3D turbulent flow …
-
3-D hybrid Eulerian-Lagrangian / particle tracking model for simulating mass transport in coastal water bodies
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992.
-
Numerical Simulation of an Open Channel Ultraviolet Waste-water Disinfection Reactor
… method to capture the water-air interface, the Lagrangian particle tracking method to determine the microbial particle trajectory and the discrete ordinate model to calculate the UV intensity field. The numerical predictions are compared with the available experimental data to validate the CFD …
-
Numerical Simulation of a Liquid Jet Atomization and Break-Up Using ANSYS-CFX 12.0
… an air-blast atomizer is shown. By employing a Lagrangian particle tracking method to track the path of the liquid particles, the liquid jet/spray phenomena was studied in light of low and high back pressure environments. The 'BLOB' primary atomization model and the Cascade Atomization and …
-
The prediction of bubble defects in castings
… then tracked using the freesurface method. The tracking limit is determined by the fineness of the mesh used. Sub grid bubbles or bubbles that only occupy a small number of cells can no longer be tracked in a continuum Eulerian simulation. Lagrangian particle tracking is then necessary. The …
-
Pseudo-nitzschia in the Gulf of Maine: investigating bloom dynamics, species introduction, and climate change implications with observations and models
… were used, as well as hydrodynamic, climate, and Lagrangian particle tracking models. Pseudonitzschia bloom toxicity was driven primarily by species composition, not environmental factors. P. australis was introduced to the region in 2016 via a coastal current from the Scotian Shelf. Climate …
-
Pseudo-nitzschia in the Gulf of Maine: investigating bloom dynamics, species introduction, and climate change implications with observations and models
… were used, as well as hydrodynamic, climate, and Lagrangian particle tracking models. Pseudo-nitzschia bloom toxicity was driven primarily by species composition, not environmental factors. P. australis was introduced to the region in 2016 via a coastal current from the Scotian Shelf. Climate …
-
Impact of Lens Angle and Nozzle Geometry on Aerodynamic Focusing: A Numerical Study
… fluid dynamics (CFD) simulations and Lagrangian particle tracking to investigate aerodynamic focusing of converging and diverging orifices with half angles ranging from 30° to 150° at two Reynolds numbers (50 and 100) and three Mach numbers (0.03, 0.1, and 0.3). The results show that …
-
Kernel-based Lagrangian method for imperfectly-mixed chemical reactions, A
Current Lagrangian (particle-tracking) algorithms used to simulate diffusion-reaction equations must employ a certain number of particles to properly emulate the system dynamics---particularly for imperfectly-mixed systems. The number of particles is tied to the statistics of the initial …
-
The variability of retention in St Helena Bay
… dynamics in St Helena Bay. Ichthyop, a lagrangian particle tracking method is used to study the spatial variations of local retention rates, with the particles released from the Bay. The circulation on the shelf of the west coast is dominated by upwelling dynamics with the equatorward …
-
Environmental drivers of the abundance and distribution of forage fishes on the Northeast US shelf, with a particular emphasis on northern sand lance
… dynamics of three sand lance hotspots through Lagrangian particle tracking models simulating larval sand lance transport. Connectivity varies among these hotspots with Georges Bank and Stellwagen Bank having notable retention while the Great South Channel relies on larvae from other hotspots. …
-
Assessment strategies for mixing in very viscous gas-liquid two-phase flows
… LES based Navier-Stokes solver with the Eulerian-Lagrangian method which uses the Particle-in-Ball approach for the Lagrangian particle tracking of the discrete phase (bubbles).;The efficacy of these methods in predicting the plume oscillation period (POP) over a wide range of superficial gas …
-
Tidally Induced Transport Dynamics in a Wadden Sea Tidal Basin and Its Changes Under Future Sea Level Rise Scenarios
… hydrodynamic modelling with FESOM-C, Lagrangian particle tracking, network-based connectivity analysis, and long-term environmental observations, the study establishes a mechanistic link between physical transport structure, ecological variability, and climate change. The results show …
-
Size based separation of submicron nonmagnetic particles through magnetophoresis in structured obstacle arrays
… size based separation technology for nonmagnetic particles in the submicron size range utilizing magnetophoretic forces. When a nonmagnetic particle is immersed in a magnetic fluid and subjected to magnetic field gradients, it behaves like a magnetic hole and experiences magnetic buoyancy forces …
-
Environmental drivers of the abundance and distribution of forage fishes on the Northeast US shelf, with a particular emphasis on northern sand lance
… dynamics of three sand lance hotspots through Lagrangian particle tracking models simulating larval sand lance transport. Connectivity varies among these hotspots with Georges Bank and Stellwagen Bank having notable retention while the Great South Channel relies on larvae from other hotspots. …
-
The response of ocean salinity patterns to climate change: implications for circulation
… major transport processes. The second is a Lagrangian particle tracking tool, used to understand the regional connectivity of water masses. From this analysis, we find that anomalous freshwater signals become well mixed within the ocean gyres, but can be isolated on larger scales. The …
-
Modelling the sustainability of overwintering Mnemiopsis leidyi populations in the North Sea
… Flux Model (ERSEM-BFM) and a Lagrangian particle tracking individual behaviour model (GITM) are used to examine the origin and sustainability of these overwintering M. leidyi individuals. The main results of this research are: (i) the model suggests it is possible there exists …
-
Argon bubble transport and capture in continuous casting with an external magnetic field using GPU-based large eddy simulations
… to model the turbulent flow. A two-way coupled Lagrangian particle tracking model is added to track the motion of argon bubbles. A particle/bubble capture model based on force balance at dendrite tips is validated and used to study the capture of argon bubbles by the solidifying steel shell. To …
Page 1 of 2