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.
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Showing 1 to 20 of 21 for “"particle resolved"”.
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Black carbon mixing state in Paris during MEGAPOLI: Connecting particle resolved observation to particle resolved modeling
… and properties of black carbon aerosol particles change continuously after emission during transport in the atmosphere. Coagulation, condensation, and photochemistry are contributing processes, collectively termed aging. Understanding these processes is important for assessing the …
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Explicit stochastic schemes for transport in particle-resolved simulations
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-08-01
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Particle-resolved modeling for evaluating assumptions in aerosol studies
… size and composition. PartMC-MOSAIC, being particle-resolved, does not require such assumptions. Thereby, the model provides a useful tool to evaluate assumptions and limitations within aerosol studies. This thesis, I show two applications that highlight the potential of this modeling …
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Improving model representations of black carbon using a particle-resolved aerosol model
"Particles containing black carbon (BC) alter the Earth's energy balance by scattering and absorbing solar radiation, by interacting with clouds, and by decreasing the albedo of ice and snow. Each of these climate effects depends on the properties of individual BC-containing particles and their …
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Particle-resolved simulations of immersion freezing with multi-species ice nucleating particles
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Black carbon mixing state impacts on aerosol activation investigations using particle-resolved model simulations
Black carbon-containing aerosol particles (called BC particles hereafter) are a major particle type in the atmosphere. Their source is the incomplete combustion of carbon containing material, which means that except for natural biomass burning all sources of BC particles are anthropogenic. They …
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Quantifying cloud chemical processes and aerosol optical properties using a particle–resolved aerosol model
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Investigating the impacts of entrainment on nucleation scavenging of black carbon particles through particle-resolved simulations
Aerosol particles have the ability to alter our climate by direct and indirect effects. Black carbon is a unique aerosol in that along with scattering, it can also absorb solar radiation, which heats the atmosphere and contributes to a positive radiative forcing. The optical and cloud condensation …
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Particle-resolved aerosol modeling on the regional scale – insights into importance of capturing aerosol mixing state
Aerosol particles in the atmosphere are complex mixtures of different chemical species, and their compositions are constantly evolving as coagulation and multiphase processes act on the particle population. The particles interact with the climate system directly by scattering and absorbing solar …
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Idealized particle-resolved large-eddy simulations to evaluate the impact of emissions spatial heterogeneity on CCN activity
… concentrations. Aerosol processes such as gas-particle partitioning and coagulation are concentration-dependent in a non-linear manner, and thus the representation of spatially heterogeneous emissions impacts aerosol aging and properties. This includes climate-relevant quantities key to …
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Study of Fluid Forces and Heat Transfer on Non-spherical Particles in Assembly Using Particle Resolved Simulation
… Most of the studies have focused on spherical particle shapes, however, in most natural and industrial processes, the particle shape is seldom spherical. In fact, particle shape is one of the important parameters that can have a significant impact on momentum, heat and mass transfer, which are …
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Investigation of the evolution of atmospheric particles with integration of the stochastic particle-resolved model PartMC-MOSAIC and atmospheric measurements
… emission, or can be also formed through gas- particle conversion processes. Aerosol particles in the atmosphere often represent a complex mixture of a wide variety of species, and the mixing state can change during the evolution of particles in the ambient environment, leading to significantly …
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An efficient multinomial sampling algorithm for spatially distributed stochastic particle simulations
This study develops a new particle-resolved method (PGM) for stochastically simulating the transport of particles by advection and diffusion processes. This particle-resolved method is based on a multinomial sampling algorithm which calculates the number of particles transferred between adjacent …
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Coupling data science and numerical simulations to empower atmospheric and environmental research
… than the computational grid resolution remain unresolved and can only rely on simplified representations. These simplified representations introduce large yet frequently poorly characterized uncertainties in climate simulations. Therefore, making sense and making use of these simulation data …
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Single-particle instrument simulator: Bridging experiments and models
… of chemical species across individual aerosol particles, is crucial for quantifying aerosol optical, chemical, and micro-physical properties. For example, a particle’s absorptivity depends on whether light-absorbing components such as black carbon are externally or internally mixed. …
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Sub-grid process analysis of the sensitivity of black carbon aging to particle microphysical properties at emission
… properties of black carbon-containing particles change due to interaction with other aerosol components after emission, altering their radiative properties and cloud condensation nuclei activity. Understanding these aging processes is essential in assessing black carbon’s direct and …
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Sensitivity of black carbon aging to modeling assumption in CAM-chem
… an aging parameterization based on more detailed particle-resolved simulations with PartMC-MOSAIC. We carried out a 1-year simulation with the global CAMChem model, where a 4-mode modal aerosol model is used. BC aerosol is transferred from a fresh, hydrophobic mode (primary carbon mode) to an …
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Methods Development and Validation for Large Scale Simulations of Dense Particulate Flow systems in CFD-DEM Framework
… Eulerian-Lagrangian technique tracks all the particles included in the system by the application of point mass models in their equation of motion. CFD-DEM is a more accurate (and more expensive) technique compared to an Eulerian-Eulerian representation. Compared to Particle Resolved …
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Deep Learning Methods for Predicting Fluid Forces in Dense Particle Suspensions
… cracking etc. Accurate modelling of the fluid-particle forces is essential for lab-scale and industry-scale simulations. Fluid-particle system solutions can be obtained using various techniques including the macro-scale TFM (Two fluid model), the meso-scale CFD-DEM (CFD - Discrete Element …
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Binning for efficient stochastic particle simulations
Restriction data tranferred 2014-07-01T11:11:50-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-02-03 13:18:53 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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