Sökning: "Lagrangian particle dispersion model"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Lagrangian particle dispersion model.

1. 1. Eulerian-Lagrangian modeling of particle motion in exhaust gas aftertreatment systems

   Författare :Henrik Ström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urea-SCR; particle trapping; flow-through filter; urea decomposition; diesel particulate matter; particle motion; particle filter; AdBlue-spray; Eulerian-Lagrangian modeling;

   Sammanfattning : In the work to design and optimize new aftertreatment system devices for NOx reduction and particulate matter removal in lean engine exhaust (such as diesel exhaust), it is of great help to be able to perform quick, robust and reliable computer simulations of system performance. A suitable platform for such simulations is Computational Fluid Dynamics (CFD) software. LÄS MER

3. 2. Numerical Study of Dispersed Two-phase Flows

   Författare :Zhilei Wu; Strömningsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal engineering; Teknik; Technological sciences; Eulerian Lagrangian model.; Eulerian Eulerian model; Lagrangian Particle Tracking; Large Eddy Simulation; Two-phase flow; Particle Image Velocimetry; applied thermodynamics; Termisk teknik; termodynamik;

   Sammanfattning : This thesis considers the numerical study of dispersed two-phase flows.Numerical simulations have been done to investigate the particle trasportation/dispersion effect in turbulent two-phase flows. Both turbulent bubble/water flows and turbulent particle/air flows are studied. LÄS MER

4. 3. Simulations of Coastal Atmospheric Dynamics and Transport Processes

   Författare :Ragothaman Sundararajan; Dimitris Melas; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; coastal atmosphere; dynamics; transport; Lagrangian particle dispersion model; mesoscale model; turbulence; Geovetenskap; Earth sciences; Geovetenskap; Meteorology; meteorologi;

   Sammanfattning : The marine atmosphere can be highly variable in space and time, and the coastal terrain plays a crucial role in influencing its properties. These, in turn, determine the atmospheric transport in the coastal zone. LÄS MER

5. 4. Dispersion modelling of volcanic emissions

   Författare :Adam Dingwell; Rutgersson Anna; David Simpson; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dispersion modelling; atmospheric; volcano; gas emissions; volcanic ash; FLEXPART; FLEXPART-WRF; Spridningsmodellering; atmosfär; vulkan; gasutsläpp; vulkanaska; FLEXPART; FLEXPART-WRF; Meteorology; Meteorologi;

   Sammanfattning : Gases and particles released by volcanoes pose a serious hazard to humans and society. Emissions can be transported over long distances before being reduced to harmless concentrations. Knowing which areas are, or will be, exposed to volcanic emissions is an important part inreducing the impact on human health and society. LÄS MER

7. 5. On the lifecycle of aerosol particles : Sources and dispersion over Scandinavia

   Författare :Peter Tunved; Hans-Christen Hansson; Johan Ström; Douglas Nilsson; Urs Baltensperger; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aerosols; Meteorology; Meteorologi;

   Sammanfattning : Aerosol particles are likely important contributors to our future climate. Further, during recent years, effects on human health arising from emissions of particulate material have gained increasing attention. LÄS MER