Library Subscription: Guest
CHT'01 - Advances in Computational Heat Transfer II. Proceedings of a Second Symposium
2001, 20-25 May, Palm Cove, Queensland, Australia

A POROUS MEDIA NUMERICAL PREDICTION OF VOID FRACTION AND DRIFT VELOCITY IN TWO-PHASE FLOW ACROSS HORIZONTAL TUBE BUNDLES

pages 961-968
Get accessGet access

ABSTRACT

The two-fluid model and the porous media concept are applied to the prediction of void fraction and drift velocity in two-phase flows across horizontal tube bundles. Numerical results are compared with experimental data, obtained for in-line and staggered tubes bundles with different tube pitch-to-diameter ratios. It is shown that the two-fluid model is able to predict the void fraction with acceptable accuracy with the single set of closure laws, without the need for the introduction and adjustment of empirical coefficients which would fit calculated data for a specific tube bundle geometry. It is found that the drift velocity can not be considered as being constant in two-phase flows across tube bundles. The proposed numerical methodology is an advantage in regard to the application of empirical correlations between void fraction and nondimensional two-phase flow parameters, because these empirical correlations comprise free coefficients, which have to be adjusted for specific tube bundle geometry.

Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections Prices and Subscription Policies Begell House Contact Us Language English 中文 Русский Português German French Spain