Yz. Yang et al., The effect of sudden change in pipe diameter on flow patterns of air-watertwo-phase flow in vertical pipe - (I) - Sudden-contraction cross-section, CHIN J CH E, 9(1), 2001, pp. 116-119
Flow patterns upstream and downstream of a sudden-contraction cross-section
in a vertical straight pipe were presented. By comparing with flow pattern
s in uniform cross-section vertical tubes, the effect of the sudden change
in pipe diameter on flow patterns was analysed. Flow pattern transition mec
hanisms were discussed and transition criteria for flow pattern transitions
were deduced accordingly using the dimensional analysis.