Two-phase flow in pipes, with particular regard to frictional effects

The flow of a mixture of air and water in both horizontal and vertical pipes was studied. Two kinds of pipes were used: a galvanised 1.009" I.D. pipe and a rough 0.986" I.D. pipe of a relative roughness k/d= .0282, together with a vertical glass pipe 0.977" I.D. The flow types as visu...

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Main Author: Abdel-Aziz, Mahmoud Fawzi
Published: University of Surrey 1956
Online Access:https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730944
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spelling ndltd-bl.uk-oai-ethos.bl.uk-7309442018-09-11T03:19:04ZTwo-phase flow in pipes, with particular regard to frictional effectsAbdel-Aziz, Mahmoud Fawzi1956The flow of a mixture of air and water in both horizontal and vertical pipes was studied. Two kinds of pipes were used: a galvanised 1.009" I.D. pipe and a rough 0.986" I.D. pipe of a relative roughness k/d= .0282, together with a vertical glass pipe 0.977" I.D. The flow types as visualized were found to be bubble and separate flow for horizontal pipes, whilst for vertical pipes the flow types, were bubble and slug. The flow was divided into four possible combinations 1. water turbulent, air turbulent : t.t. flow 2. water viscous, air viscous : v.v. flow 3. water viscous, air turbulent : v.t. flow 4. water turbulent, air viscous : t.v. flow. Accordingly, the flow was found, to be of the t.t. and t.v. types. Equations were derived for determining the fraction of pipe area filled with air. Two different equations were found describing the separate and bubble flow. These equations involved constants which were determined by experiment. They lead to a dimensionless parameter dPTP/dP2 which had a definitive relationship with the operating variables. The behaviour of this parameter is different, for different types of flow, which was determined experimentally for the t.t, and t.v. flow types. The results were compared with those of other investigators and a fairly satisfactory correlation obtained. A. new method for measuring the fraction of pipe area filled with air is presented. The method appeared promising when the results were compared with, those obtained by the use of a cine-camera. This method is of great interest since it is fundamental and with further development greater accuracy should be possible.University of Surreyhttps://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730944http://epubs.surrey.ac.uk/844039/Electronic Thesis or Dissertation
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description The flow of a mixture of air and water in both horizontal and vertical pipes was studied. Two kinds of pipes were used: a galvanised 1.009" I.D. pipe and a rough 0.986" I.D. pipe of a relative roughness k/d= .0282, together with a vertical glass pipe 0.977" I.D. The flow types as visualized were found to be bubble and separate flow for horizontal pipes, whilst for vertical pipes the flow types, were bubble and slug. The flow was divided into four possible combinations 1. water turbulent, air turbulent : t.t. flow 2. water viscous, air viscous : v.v. flow 3. water viscous, air turbulent : v.t. flow 4. water turbulent, air viscous : t.v. flow. Accordingly, the flow was found, to be of the t.t. and t.v. types. Equations were derived for determining the fraction of pipe area filled with air. Two different equations were found describing the separate and bubble flow. These equations involved constants which were determined by experiment. They lead to a dimensionless parameter dPTP/dP2 which had a definitive relationship with the operating variables. The behaviour of this parameter is different, for different types of flow, which was determined experimentally for the t.t, and t.v. flow types. The results were compared with those of other investigators and a fairly satisfactory correlation obtained. A. new method for measuring the fraction of pipe area filled with air is presented. The method appeared promising when the results were compared with, those obtained by the use of a cine-camera. This method is of great interest since it is fundamental and with further development greater accuracy should be possible.
author Abdel-Aziz, Mahmoud Fawzi
spellingShingle Abdel-Aziz, Mahmoud Fawzi
Two-phase flow in pipes, with particular regard to frictional effects
author_facet Abdel-Aziz, Mahmoud Fawzi
author_sort Abdel-Aziz, Mahmoud Fawzi
title Two-phase flow in pipes, with particular regard to frictional effects
title_short Two-phase flow in pipes, with particular regard to frictional effects
title_full Two-phase flow in pipes, with particular regard to frictional effects
title_fullStr Two-phase flow in pipes, with particular regard to frictional effects
title_full_unstemmed Two-phase flow in pipes, with particular regard to frictional effects
title_sort two-phase flow in pipes, with particular regard to frictional effects
publisher University of Surrey
publishDate 1956
url https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730944
work_keys_str_mv AT abdelazizmahmoudfawzi twophaseflowinpipeswithparticularregardtofrictionaleffects
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