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The following discussion has been moved from Wiktionary:Requests for verification.

This discussion is no longer live and is left here as an archive. Please do not modify this conversation, though feel free to discuss its conclusions.

Rfv-sense "A discrete quantity of one fluid that flows through the line surrounded by another." Tagged but not listed. - -sche (discuss) 03:52, 4 March 2012 (UTC)

A good initial question seem to be, does anyone know what this means? I can't quite figure it out. Mglovesfun (talk) 23:53, 6 March 2012 (UTC)
Think of a w:Lava Lamp. The slug would be like the colored blobs. Because it's completely enclosed by the other fluid, it would move as a unit. Chuck Entz (talk) 04:42, 7 March 2012 (UTC)
Right, surely the 'flows through the line surrounded by another' is wrong, the fluid doesn't follow through any lines does it? How can fluid flow through a line? Mglovesfun (talk) 10:59, 7 March 2012 (UTC)
It's a sense of the word line that we don't have, as in a fuel line. Chuck Entz (talk) 13:35, 7 March 2012 (UTC)
... but even if we have that sense of "line", it doesn't apply here. I suggest we remove "through the line". Dbfirs 10:08, 8 March 2012 (UTC)
It does apply- sort of... It shouldn't be removed, but replaced with better wording, since it's a critical part of the context (see w:slugcatcher). You'll note that the surrounding substance doesn't have to be liquid (see also w:Water hammer#Related_phenomena) Chuck Entz (talk) 13:17, 8 March 2012 (UTC)
I believe the "line" here is a streamline ("a line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow"). The slug in question may be the same as in w:gas slug. — Xavier, 23:32, 8 March 2012 (UTC)
Isn't this an instance of a more general sense of slug? DCDuring TALK 23:43, 8 March 2012 (UTC)
MWOnline has: "a detached mass of fluid (as water vapor or oil) that causes impact (as in a circulating system)"
I'm not quite sure that I understand the "causes impact" clause, however. DCDuring TALK 23:46, 8 March 2012 (UTC)
I think the "impact" caused is the slug hitting the walls of the pipes or other barriers in the system. Odd way to word it... Chuck Entz (talk) 23:35, 9 March 2012 (UTC)
  • I have added a new definition and provided five citations that illustrate various aspects of the new definition. I think this new sense includes the intent of the definition under RfV. DCDuring TALK 00:22, 9 March 2012 (UTC)
    Hmmm. This does not capture the usage in the w:Slugcatcher article, which seems specific to two- (or multi- ?) phase flow through a pipeline. DCDuring TALK 00:33, 9 March 2012 (UTC)
I simplified the definition a bit to give what I think is the essence of the underlying concept. Chuck Entz (talk) 23:45, 9 March 2012 (UTC)
The simplification does not encompass the usage in the citations. "Slug of milk" in a teat and "slug of sand" on a beach, for example, don't fit. DCDuring TALK 23:51, 9 March 2012 (UTC)
Definition tweaked Chuck Entz (talk) 00:00, 10 March 2012 (UTC)
So... I've removed "A discrete quantity of one fluid that flows through the line surrounded by another.", and kept "A discrete mass of a material that moves as a unit, usually through another material." - -sche (discuss) 03:51, 16 April 2012 (UTC)