Search for dissertations about: "flow physics"

Showing result 1 - 5 of 362 swedish dissertations containing the words flow physics.

  1. 1. A Study of Using Pulsed Neutron Activation for Accurate Measurements of Water Flow in Pipes

    University dissertation from Chalmers University of Technology

    Author : Per Lindén; Chalmers tekniska högskola.; Chalmers University of Technology.; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; pulsed neutron activation; flow measurements; time averaging; turbulent flow; pipe flow; eddy diffusion; neural networks;

    Abstract : The objectives of this work were 1) to investigate the performance of the pulsed neutron activation (PNA) method for determination of mass flow of water in pipes, and 2) to improve the accuracy such that an error less than 1% become possible with the PNA method. The ultimate purpose is to develop this method into a high-accuracy portable and non-intrusive flow-meter that easily can be used as a calibration tool at a number of field applications, e. READ MORE

  2. 2. Pulsed Neutron Activation for Determination of Water Flow in Pipes

    University dissertation from Chalmers University of Technology

    Author : Håkan Mattsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; Pulsed Neutron Activation; PNA; CFD; Flowmeter; Pipe flow;

    Abstract : In a Pulsed Neutron Activation (PNA) flowmeter neutron induced activity is used to measure water flow in pipes. The water in the pipe is bombarded with neutron pulses which introduce activity into the pipe. The activity is then transported and mixed with the flow. READ MORE

  3. 3. Noise analysis for two-phase flow measurements and reactor stability monitoring

    University dissertation from Chalmers University of Technology

    Author : Ola Thomson; Chalmers tekniska högskola.; Chalmers University of Technology.; [1994]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; noise analysis; radation correlation; two-phase flow; local parameters; BWR stability monitoring; decay ratio;

    Abstract : .... READ MORE

  4. 4. Water flow measurement with the pulsed neutron activation method

    University dissertation from Chalmers University of Technology

    Author : Per Lindén; Chalmers tekniska högskola.; Chalmers University of Technology.; [1997]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  5. 5. Laser-Based Combustion and Trace-element Analysis

    University dissertation from Chalmers University of Technology

    Author : Yvonne Malmsten; Chalmers tekniska högskola.; Chalmers University of Technology.; [1997]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; counter-flow diffusion flame; laser-induced fluorescence; LIF; laser-enhanced ionisation; LEI; trace element analysis; graphite furnace; flow-tagging; meta-stable; NO; OH;

    Abstract : Laser spectroscopy has been utilised as a tool for combustion diagnostics and sensitive trace-element analysis. In the field of combustion analysis, a characterisation of a CH4/N2 - O2/N2 counter-flow diffusion flame has been performed using Laser-Induced Fluorescence (LIF). READ MORE