MODELING OF TURBULENT BUBBLY PIPE FLOW WITH THE CFX4.2 COMPUTER PROGRAM

摘要

The purpose of this paper is to investigate the ability of the CFX4.2 computerprogram to model adiabatic, turbulent, upward bubbly flow in a pipe. An effort wasperformed to estimate the numerical uncertainty of the calculation. Only then would acomparison of the calculations with the experimental results clarify the shortcomingsof the physical models. The comparison of the predictions with the experimental dataindicates that the code was able to predict effects of liquid velocity flattening andturbulence intensity reduction caused by the presence of the bubbles. It was foundthat application of Sato’s model of bubble induced turbulence led to a betteragreement with the experiment. However, the calculation of the wall void fractionpeak value was underpredicted.