Search for dissertations about: "VOS"

Showing result 1 - 5 of 10 swedish dissertations containing the word VOS.

  1. 1. Interacting particles and droplets at low Reynolds numbers

    University dissertation from Department of Energy Sciences, Lund University

    Author : Lisa Prahl; Lund University.; Lunds universitet.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gases; VOS; VOF; Multiphase flow; Interaction; Particles; Droplets; fluid dynamics; plasmas; Gaser; fluiddynamik; plasma;

    Abstract : The overall purpose with this work is to study the flow past particles and droplets using numerical simulations. Especially the interaction among particles and droplets have been a main objective as the results are to be used in order to improve already existing spray models. READ MORE

  2. 2. Numerical modeling of deforming bubble transport related to cavitating hydraulic turbines

    University dissertation from Daniel Lörstad, Lagerbrings väg 7A, 224 60 Lund

    Author : Daniel Lörstad; Lund University.; Lunds universitet.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gases; fluid dynamics; plasmas; Gaser; fluiddynamik; plasma; Energy research; Energiforskning; Direction Averaged Curvature DAC ; Direction Averaged Normal DAN ; Volume of Solid VOS ; Volume of Fluid VOF ; Lagrangian Particle Tracking LPT ; Large Eddy Simulation LES ; bubble; multiphase; turbulent flows; CFD; hydro-turbine;

    Abstract : Cavitation is a problem in many hydroelectric power plants since it can cause adverse effects on performance and damage to nearby solid surfaces. The concerns of this thesis are the numerical aspects of flow simulations in cavitating hydraulic turbines which contain several difficulties: turbulent and complex flows, steady and moving parts of the geometry, bubble transport and cavitation development. READ MORE

  3. 3. Numerical Study of Fluid-Structure Interaction with Application to Oscillating Cylinders

    University dissertation from Mikhail Lazarkov, Magistratsvagen F55, 204, Lund

    Author : Mikhail Lazarkov; Lund University.; Lunds universitet.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lock-in.; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik; synchronization; flow-induced vibration; LES; Volume of Solid method; Virtual Boundary method; vortex-shedding; confined cylinder; Fluid-structure interaction; wake;

    Abstract : The problem of fluid-structure interaction, occurring in many industrial and engineering applications, are of great importance, since interaction of a flow and a structure in it can lead to serious damages of the structure. The fluid-structure interaction gives rise to a variety of different physical phenomena such as flow-induced vibration, noise generation, etc. READ MORE

  4. 4. On-demand Restricted Delegation A Framework for Dynamic, Context-Aware, Least-Privilege Delegation in Grids

    University dissertation from Stockholm : Universitetsservice US AB

    Author : Mehran Ahsant; KTH.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Grid Security; Restricted and Context-Aware Delegation; Delegation Protocol; On-demand Delegation; Dynamic Trust Federation; Grid Interoperability; Credential Mapping; TECHNOLOGY Information technology Computer science Computer science; TEKNIKVETENSKAP Informationsteknik Datavetenskap Datalogi;

    Abstract : In grids, delegation is a key facility that can be used to authenticate and authorize requests on behalf of disconnected users. In current grid systems,delegation is either performed dynamically, in an unrestricted manner, or by a secure but static method. READ MORE

  5. 5. Stepping, placing and headturning biases in newborn infants A neurodevelopmental perspective

    University dissertation from Umeå : Institutionen för psykologi, Umeå universitet

    Author : Erik Domellöf; Umeå universitet.; [2004]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SOCIAL SCIENCES Social sciences Psychology; SAMHÄLLSVETENSKAP Socialvetenskap Psykologi; Psychology; psykologi;

    Abstract : In the present thesis the stepping, placing and head turning responses in healthy humanfullterm newborns are investigated. The main focus is put on a study of these newbornresponses in relation to functional asymmetries, while at the same time exploring anddiscussing different factors that possibly can affect the outcome of such studies. READ MORE