摘要
In this companion paper, flow patterns in the upstream and downstream tubes of a sudden-expansion
cross-section (SECS) in a vertical straight pipe were presented. The effect of SECS on flow patterns upstream
and downstream was analyzed by comparing with flow patterns in uniform cross-section vertical tubes. It is found the effect is great. There exist great instabilities of two-phase flow in the neighboring areas of the SECS both downstream and upstream.
In this companion paper, flow patterns in the upstream and downstream tubes of a sudden-expansion cross-section (SECS) in a vertical straight pipe were presented. The effect of SECS on flow patterns upstream and downstream was analyzed by comparing with flow patterns in uniform cross-section vertical tubes. It is found the effect is great. There exist great instabilities of two-phase flow in the neighboring areas of the SECS both downstream and upstream.
基金
the National Natural Science Foundation of China (No. 59236130).
