Search for dissertations about: "stirred"

Showing result 1 - 5 of 97 swedish dissertations containing the word stirred.

  1. 1. Fluid and Solid Particle Dynamics in Stirred Vessels

    Author : Mattias Ljungqvist; Chalmers University of Technology; []
    Keywords : mixing time; pitched blade turbine; impeller modelling; stirred vessels; computational fluid dynamics; multi-fluid model; suspension of solids; phase-Doppler anemometry; laser Doppler anemometry; closed vessels;

    Abstract : The present thesis deals with the fluid dynamics of stirred vessels and particularly those that are to be used in conjunction with solids suspensions. Stirred vessels are very common in the process industry and large amounts of energy can be saved by optimising their operation. READ MORE

  2. 2. Modeling of induction stirred ladles

    Author : Mayur Pal; Pär Jönsson; Pavel Ramirez Lopez; KTH; []
    Keywords : induction ladle; electromagnetic; Lorentz forces; magnetic stirrer; magnetic diffusion; Navier-Stokes; FEM;

    Abstract : Over the years numerous computational fluid dynamics models have been developed in order to study the fluid flow in gas and induction stirred ladles. These models are used to gain insight in the industrial processes used in ladle treatment of steel. A unified model of an induction stirred Ladle in two and three dimensions is presented. READ MORE

  3. 3. On the modelling of turbulent flow and mixing in stirred reactors

    Author : Johan Revstedt; Strömningsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbulence; CFD; stirred reactors; impeller modelling; Energy research; mixing; LES; Energiforskning;

    Abstract : This thesis concerns the numerical simulations and modelling of the flow structure and scalar transport in stirred reactors. For this Large Eddy Simulations (LES) have been used. The flow situation in a stirred reactor includes several flow phenomena that are not well predicted by "standard" two-equation models, e.g. READ MORE

  4. 4. Hydrodynamics and Complete Suspension in Axially Stirred Vessels

    Author : Claes Sturesson; Chalmers University of Technology; []
    Keywords : axially stirred tank; particle force balances; complete suspension; turbulence modeling; turbulent boundary layer; LDA;

    Abstract : Complete suspension of solid particles in stirred vessels has been subject to numerous investigationsin order to develop appropriate design criteria for solid/liquid suspensions. Previous work on this matter has often suffered from the lack of knowledge of fluid mechanics in the system and models based on overall flow characteristics have been proposed in the literature. READ MORE

  5. 5. Some aspects of the design of stirred vessels

    Author : Mattias Ljungqvist; Chalmers University of Technology; []
    Keywords : impeller discharge; mixing times; impeller displacement; CFD; turbulence; suspension; closed stirred vessels; LDA;

    Abstract : .... READ MORE