Slug Formation and Frequency of Slugging in Gas-Liquid Flows

When a slug forms, the liquid level in a large length of pipe drops as the slug propagates downstream. Thus two time scales enter the slug frequency analysis: one characterizing wave evolution and one involving liquid buildup. When the Froude number of the stratified flow in a horizontal pipe at the onset of slug flow is less than unity, the frequency is related to the motion of upstream propagating gravity waves associated with the formation of slugs. A stochastic model is used to describe the frequency for supercritical flow conditions for which slugs form from roll wave coalescence far from the inlet, and also for conditions for which slugs are forming very close to the inlet. For stratified downflows in inclined pipes, the flow is supercritical. However, the frequency of slugging is observed to be periodic and equal to the frequency of long wavelength waves that are predicted by linear stability.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Woods, Bennett David

Contributors dc:contributor

• Hanratty, Thomas J.

• Engineering, Petroleum

Language dc:language

eng

Identifier

(MiAaPQ)AAI9904625

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/82455