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Vortex free downflow in vertical drains
Author(s) -
McDuffie Norton G.
Publication year - 1977
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690230107
Subject(s) - body orifice , mechanics , volumetric flow rate , flow coefficient , flow (mathematics) , vortex , weir , liquid flow , two phase flow , thermodynamics , materials science , chemistry , physics , engineering , mechanical engineering , cartography , geography
Performance of flush drains in gas‐liquid separators has been evaluated under conditions of variable gas flow and pressure, liquid height and flow rate, and drain diameter. For the two‐phase flow regime, liquid flow rate is found to be independent of vessel pressure or gas flow rate. Transition from weir control to orifice control of liquid flow rate occurs over the range of H/D ratios from 0.4 to 1.5. In this range, simple orifice equations do not apply. Revised design equations for use to determine minimum liquid height for maintenance of single‐phase downflow in gas‐liquid separators are presented.