Talk:Darcy (unit)

Soil Low‑importance

	Earth sciences portal Darcy (unit) is within the scope of WikiProject Soil, which collaborates on Soil and related articles on Wikipedia. If you would like to participate, you can choose to edit this article, or visit the project page for more information.SoilWikipedia:WikiProject SoilTemplate:WikiProject SoilSoil articles
Low	This article has been rated as Low-importance on the project's importance scale.

Measurement (defunct)

This article is within the scope of WikiProject Measurement, a project which is currently considered to be defunct.MeasurementWikipedia:WikiProject MeasurementTemplate:WikiProject MeasurementMeasurement articles

Engineering Low‑importance

	Engineering portal This article is within the scope of WikiProject Engineering, a collaborative effort to improve the coverage of engineering on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.EngineeringWikipedia:WikiProject EngineeringTemplate:WikiProject EngineeringEngineering articles
Low	This article has been rated as Low-importance on the project's importance scale.

Energy

	Energy portal This article is within the scope of WikiProject Energy, a collaborative effort to improve the coverage of Energy on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.EnergyWikipedia:WikiProject EnergyTemplate:WikiProject Energyenergy articles
???	This article has not yet received a rating on the project's importance scale.

Geology

	Geology portal Talk:Darcy (unit) is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.GeologyWikipedia:WikiProject GeologyTemplate:WikiProject GeologyGeology articles
???	This article has not yet received a rating on the project's importance scale.

About merging

Well, maybe it can not merge. But it shouldn't be deriving Darcy's law. I'd be happy if it looked more like Newton, or similar page for a unit of measure.Mwtoews 17:48, 27 July 2006 (UTC)[reply]

As the article says, "[t]he darcy is defined using Darcy's Law ... ." It doesn't make sense in other contexts --- unlike forces. Also, in the Newton article, the definition implicitly uses F=ma but doesn't say so outright. Neither article is deriving the underlying law, just using it.

Permeability can also be measured in other units such as meters squared, centimeters squared, barns, or any other unit of area; you wouldn't merge those into the article on Darcy's law, right? Perhaps it would make you happier to mention that the Darcy is an effective cross-section? Lunch 21:23, 27 July 2006 (UTC)[reply]

Agreed. I'll remove the merge tag, and massage this article to be more about the unit, and some application of Darcy's law. I'll do that some day later. I'll also add a handy conversion table (like the Newton article). Mwtoews 00:13, 28 July 2006 (UTC)[reply]

Examples

It would be nice if this page had, or linked to, some example scenarios with estimated permeability in millidarcies or whatever. I came here curious about that, so I'm not qualified to write it (yet).

Defiler (talk) —Preceding undated comment added 19:30, 27 June 2010 (UTC).[reply]

Capitalization

Oops... I should have read the page in more detail before jumping to conclusions... my apologies. I am stunned by the AAPG style guide reference claiming that Darcy should not be capitalized. I'll spend some more time researching this topic and won't make any edits until I have a solid reference to base them on. E70s (talk) 18:44, 23 May 2012 (UTC)[reply]

It is my understanding that the unit "Darcy" should always be capitalized, precisely because it is named after Henri Darcy. It's the same as with the unit for force, "Newton", is always capitalized ("N"). I edited the page throughout to reflect this. It has been something that has bothered me in some of the porous media flow literature, so please either prove me wrong or help get rid of this typo. E70s (talk) 18:37, 23 May 2012 (UTC)[reply]

I would agree with the statement that it should be capitalized. It's not an SI unit and the only industry that still uses it (oil & gas), abbreviates it as D or mD and so the industry standard should be the standard. 63.84.120.210 (talk) 20:09, 8 June 2023 (UTC)[reply]

The AAPG style guide is now a dead link - if anyone knows an alternative source please replace it 195.59.47.132 (talk) 14:37, 7 March 2016 (UTC)[reply]

An archived link to the AAPG style guide has been resolved, in addition they have a Wiki, where they use both "Darcy" and "millidarcy". Looking through the literature, I do not see "milliDarcy", just "millidarcy", which implies "darcy". USGS use "darcy" in this 1986 report. Streltsova, 1976 doi:10.1029/WR012i003p00405 explicitly define in an appendix "A unit used in the petroleum industry, darcy, has the value of 0.987 × 10⁻⁸cm²". This is the earliest definition I can see (without looking too deep). While I think it's okay to have "Darcy" here, it appears to be more formally defined in the literature as "darcy". +mt 03:34, 6 October 2016 (UTC)[reply]

Requested move

The following discussion is an archived discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review. No further edits should be made to this section.

The result of the move request was: Move both. Unanimous support for the proposal. -- BrownHairedGirl (talk) • (contribs) 12:06, 5 February 2014 (UTC)[reply]

Darcy → Darcy (unit)
Darcy (disambiguation) → Darcy

– If there's a WP:PRIMARYTOPIC for "Darcy," this obscure unit of measurement isn't it. Mr. Darcy alone is more popular and of at least as much educational/scholarly value as this topic. --BDD (talk) 21:26, 28 January 2014 (UTC)[reply]

Support, too many meanings, and the current topic too obscure, for there to be a primary topic. bd2412 T 21:48, 28 January 2014 (UTC)[reply]
Speedy support. This is silly. Red Slash 00:02, 29 January 2014 (UTC)[reply]
Support per nom -- 70.50.148.122 (talk) 07:12, 29 January 2014 (UTC)[reply]
Support and speedy close per WP:SNOW. --B2C 17:42, 29 January 2014 (UTC)[reply]

The above discussion is preserved as an archive of a requested move. Please do not modify it. Subsequent comments should be made in a new section on this talk page or in a move review. No further edits should be made to this section.

Category

About merging

Examples

Capitalization

Requested move