Title page for ETD etd-01152008-121542


Document Type Master's Dissertation
Author Van Rooyen, Eugene
Email eugenevr@tuks.co.za
URN etd-01152008-121542
Document Title Time-fractional analysis of flow patterns during refrigerant condensation
Degree MEng (Mechanical Engineering)
Department Mechanical and Aeronautical Engineering
Supervisor
Advisor Name Title
Prof J P Meyer Co-Supervisor
Prof L Liebenberg Supervisor
Keywords
  • flow pattern
  • smooth tube
  • condensation
  • time fraction
Date 2007-09-05
Availability unrestricted
Abstract

The conceptual design and basic layout of a modular refrigerant test system capable of flow condensation and evaporation were performed. The purpose of this study was the investigation of flow patterns during refrigerant condensation in intermittent flow in order to improve the prediction models. An objective flow pattern descriptor was developed to identify and describe transitions in flow regimes. The methods developed and utilised in this study were used to develop a time-fractional map of the intermittent flow regime. The time-fractions are statistical averages of gravity dominated and shear dominated flows occurring in intermittent flow.

University of Pretoria

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