Essays about: "dispersion modeling"

Showing result 1 - 5 of 21 essays containing the words dispersion modeling.

1. 1. Inverse Uncertainty Quantification for Sounding Rocket Dispersion

   University essay from KTH/Matematik (Avd.)

   Author : Tove Ågren; [2022]
   Keywords : Uncertainty quantification; Bayesian inference; Rocket dispersion; Neural networks; Markov Chain Monte Carlo.; Osäkerhetskvantifiering; Bayesiansk inferens; Raketspridning; Neurala nätverk; Markovkedje-Monte Carlo;

   Abstract : Sounding rocket impact points are subject to dispersion due to uncertainties in simulation model parameters and perturbations of the rocket trajectory during flight. Estimating the area of dispersion assumes that associated model uncertainties and magnitude of perturbations have already been inferred. READ MORE

3. 2. Implementing spatial variance in the rate of photolytic breakdown of NO2 in urban street canyons

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Fabian Friberg; [2022]
   Keywords : cfd; computational fluid dynamics; NOx; street canyon; NO2; NO; O3; photolysis; OpenFOAM; Physics and Astronomy;

   Abstract : In this study a module for calculating the solar exposure of individual fluid cells was developed to more accurately represent the effect of photolysis on the pollutant dispersion in an urban street canyon. The module was tested and validated on 12 different cases, each with a different geographical location, time of year and/or time of day. READ MORE

4. 3. Inverse Atmospheric Dispersion Modeling in Complex Geometries

   University essay from Umeå universitet/Institutionen för fysik

   Author : Charlie Pelland; [2022]
   Keywords : atmospheric dispersion modeling; dispersion modeling; invers dispersion modeling; atmospheric dispersion; invers atmospheric dispersion; CFD; computational fluid dynamics; radioactive release; openfoam; CRBN; dry deposition; dry deposition velocity; scavenging effect; wet deposition; optimization model; Reynolds Averaged Navier-Stokes; adjoint mode; time-dependent rain simulation; time-dependent rain; time dependent rain simulation; time dependent rain;

   Abstract : In the event of a radioactive release in an urban environment the consequent response mustbe swift and precise. As soon as first responders have correct information, they can make anaccurate risk assessment. However, if the position, release rate and time of the radioactiverelease is unknown it is hard to know how the pollutant will spread. READ MORE

5. 4. Contamination analysis of the landfill Rösaberg inerta massor : Risk assessment and investigation of the contaminant distribution

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Westander Lisa; [2020]
   Keywords : Landfill; MODFLOW; Risk assessment; Site-specific guidelines; Deponi; MODFLOW; Riskbedömning; Platsspecifika riktvärden;

   Abstract : The dispersion of contaminants deriving from landfills poses a risk to the surrounding environment and human health. Old landfills are treated with extra precaution, due to their poorer construction, less stringent operation and lack information regarding the waste content. Vetlanda municipality has identified 48 old landfills. READ MORE

6. 5. Reducing waste with an optimized trimming model in production planning

   University essay from Umeå universitet/Institutionen för matematik och matematisk statistik

   Author : Sofia Hallbäck; Ellen Paulsson; [2020]
   Keywords : Cutting stock problem; knapsack problem; trimming; optimization; carton board; forest industry; mathematical modeling;

   Abstract : In which ways can the process of trimming dispersion coated board products be optimized so as to reduce material waste and increase production efficiency? This is the question that this master thesis report seeks to answer. In paper production, alot of waste is generated when cutting production reels into customer reels. READ MORE