Search for dissertations about: "confined flows"

Showing result 1 - 5 of 33 swedish dissertations containing the words confined flows.

  2. 1. Turbulent jets in confined spaces : application in mixing ventilation: experimental and numerical studies

    Author : Taghi Karimipanah; Mats Sandberg; H. A. Awbi; Högskolan i Gävle; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbulent; wall jet; impinging jet; free jet; confinement effect; pressure; throw; experimental; numerical; corner; momentum; mixing ventilation;

    Abstract : The basis of mixing ventilation is the airflow supply to the room by means of jets initiatedfrom the ventilation diffusers. To avoid the draught problem, the design of mixing ventilationmakes uses the throw term, which is defined as the distance to the supply air terminal inwhich the jet centreline mean velocity is decreased to a given value. READ MORE

  4. 2. Aeroacoustics Studies of Duct Branches with Application to Silencers

    Author : Mikael Karlsson; Mats Åbom; Luc Mongeau; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silencer; muffler; confined flows; flow duct; aeroacoustics; vortex sound; acoustic multiports; linear stability; self-sustained oscillations; whistling; Herschel-Quincke tube; acoustic resonator; Fluid mechanics; Strömningsmekanik;

    Abstract : New methodologies and concepts for developing compact and energy efficient automotive exhaust systems have been studied. This originates in the growing concern for global warming, to which road transportation is a major contributor. READ MORE

  5. 3. Flow structures in solid-liquid suspensions in mixing and confined jets

    Author : Matthias Eng; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lomb algorithm; macro-instabilities; stirred tank; integral length scale; solid-liquid; confined jet; LDV; parcticle flow; jet instability;

    Abstract : This thesis investigates the influence of solid particles on different liquid flow systems.Large-scale periodic fluctuations such as macro instability (MI) phenomena in a mixingvessel and jet flows in a confined jet were experimentally analyzed by means of LDV. Theinfluences of different sized (0.5mm-2mm) glass particles (0%vol - 6. READ MORE

  6. 4. Dynamics of Exhaust Valve Flows and Confined Bluff Body Vortex Shedding

    Author : Marcus Winroth; P. Henrik Alfredsson; Knud Erik Meyer; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Mechanics; Teknisk mekanik;

    Abstract : This thesis can be divided into two interconnected topics; engine exhaust-valve flows and confined bluff-body vortex shedding. When optimising engine flow systems it is common to use low order simulation tools that require empirical inputs, for instance with respect to flow losses across the exhaust valves. READ MORE

  7. 5. Measurements and simulations of thermoplasmonically induced Marangoni flows

    Author : Pantea Dara; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microbubbles; optical force microscopy; Marangoni flow; thermoplasmonics; microfluidics;

    Abstract : Particle transport in microfluidic environments is often dominated by slow diffusion near interfaces. However, by inducing localized fluid flow, it is possible to actively transport suspended nano-objects in confined spaces. READ MORE