Influence of the bubble size distribution on radial gas fraction profiles in vertical pipe flow


Influence of the bubble size distribution on radial gas fraction profiles in vertical pipe flow

Lucas, D.; Krepper, E.; Prasser, H.-M.

The paper presents a method for the prediction of the radial gas fraction profile in vertical pipe flow for a given bubble size distribution. A large number of bubble classes is considered. An equilibrium of the forces acting on a bubble perpendicular to the flow direction is assumed. On basis of the radial profile of the liquid velocity, radial distributions of the volume fraction are calculated separately for all bubble classes according to a given bubble size distribution. The sum of these distributions is the radial profile of the gas fraction. It again influences the liquid velocity. The final solution is obtained by an iteration process, which consideres the feedback between the gas fraction profile and the profile of the liquid velocity. The model is the basis of a fast running one-dimensional steady state computer code. The results of the model are compared with experimental data for a number of gas and liquid volume flow rates.

Keywords: Two-phase flow; Flow regime; Bubble flow

  • Lecture (Conference)
    Second Japanese-European Two-Phase Flow Group Meeting, Tsukuba, Japan, September 25-29, 2000, Proceedings on CD-ROM: K-2.pdf
  • Contribution to proceedings
    Second Japanese-European Two-Phase Flow Group Meeting, Tsukuba, Japan, September 25-29, 2000, Proceedings on CD-ROM: K-2.pdf

Permalink: https://www.hzdr.de/publications/Publ-3517
Publ.-Id: 3517