• More complex than single-phase flow
• Physical properties such as density and viscosity of the flowing fluid are considered as mixture (gas-liquid)
• Flow velocity in the conduit (pipe or any other geometrical shape) is conceptualized as “Superficial Velocity”
• The basis of flow correlations is single-phase but the further developed correlations have a lot of empirical & experimental data embedded in them
• The concept of “Holdup” is applied for either phase
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Reproduction
This publication may be reproduced in whole or in part and in any form for educational or nonprofit purposes without special permission from the copyright holders, provided acknowledgement of the source is made. UNEP would appreciate receiving a copy of any publication that uses this publication as a source. No use of this publication may be made for resale or for any other commercial purpose whatsoever without prior permission in writing from the United Nations Environment Programme.
Clearing the Waters A focus on water quality solutions
Reproduction
This publication may be reproduced in whole or in part and in any form for educational or nonprofit purposes without special permission from the copyright holders, provided acknowledgement of the source is made. UNEP would appreciate receiving a copy of any publication that uses this publication as a source. No use of this publication may be made for resale or for any other commercial purpose whatsoever without prior permission in writing from the United Nations Environment Programme.
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