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Flow and Heat and Mass Transfer in Laminar and Turbulent Mist Gas-Droplets Stream over a Flat Plate

  • Victor I. Terekhov
  • Maksim A. Pakhomov

Part of the SpringerBriefs in Applied Sciences and Technology book series (BRIEFSAPPLSCIENCES)

Also part of the SpringerBriefs on Multiphase Flow book sub series (BRIEFSMUFLO)

Table of contents

About this book

Introduction

In this book the author presents selected challenges of thermal-hydraulics modeling of two-phase flows in minichannels with change of phase. These encompass the common modeling of flow boiling and flow condensation using the same expression. Approaches to model these two respective cases show, however, that experimental data show different results to those obtained by methods of calculation of heat transfer coefficient for respective cases. Partially that can be devoted to the fact that there are non-adiabatic effects present in both types of phase change phenomena which modify the pressure drop due to friction, responsible for appropriate modelling. The modification of interface shear stresses between flow boiling and flow condensation in case of annular flow structure may be considered through incorporation of the so called blowing parameter, which differentiates between these two modes of heat transfer. On the other hand, in case of bubbly flows, the generation of bubbles also modifies the friction pressure drop by the influence of heat flux. Presented are also the results of a peculiar M-shape distribution of heat transfer coefficient specific to flow boiling in minichannels. Finally, some attention is devoted to mathematical modeling of dryout phenomena. A five equation model enabling determination of the dryout location is presented, where the mass balance equations for liquid film, droplets and gas are supplemented by momentum equations for liquid film and two-phase core.

Keywords

Dryout Flow Boiling Flow Condensation M-shape Distribution of Heat Transfer Coefficient Minichannels Non-adiabatic Effects Pressure Drop

Authors and affiliations

  • Victor I. Terekhov
    • 1
  • Maksim A. Pakhomov
    • 2
  1. 1.of Siberian Branch of Russian Academy of SciencesLab. of Thermal and Gas Dynamics, Kutateladze Institute of ThermophysicsNovosibirskRussia
  2. 2.of Siberian Branch of Russian Academy of SciencesLab. of Thermal and Gas Dynamics Kutateladze Institute of ThermophysicsNovosibirskRussia

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-319-04453-8
  • Copyright Information The Author(s) 2014
  • Publisher Name Springer, Cham
  • eBook Packages Engineering
  • Print ISBN 978-3-319-04452-1
  • Online ISBN 978-3-319-04453-8
  • Series Print ISSN 2191-530X
  • Series Online ISSN 2191-5318
  • Buy this book on publisher's site
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