Coalescence of two gas slugs rising in a vertical column of liquid

✍ Scribed by A.M.F.R. Pinto; J.B.L.M. Campos

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 738 KB
• Volume: 51
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(95)00254-5

✦ Synopsis

This work describes an experimental investigation about the coalescence of pairs of gas slugs rising in vertical columns of liquids covering a wide range of liquid viscosities. The experiments were performed in columns with 19, 32 and 52 mm of internal diameter and slug coalescence was followed by means of a new experimental technique, based on the signals of differential pressure transducers. Important data reported in this work are:

--the minimum distance between slugs above which there is no interaction, :rain; --the velocity of approach of the trailing slug as a function of its distance to the leading one.

Values of :mln are shown to be related to the flow pattern in the wake of liquid behind gas slugs and correlations are provided for the determination of groin; in all cases :m~ is about four times the wake length, fw.