Home › Entities › index_number › Reynolds number

Reynolds number

dimensionless quantity that is used to help predict similar flow patterns in different fluid flow situations
Place index_number Q178932
Press Enter · cited answer in seconds

Summary

Reynolds number is an index number[1]. It ranks in the top 6% of index number entities by monthly Wikipedia readership (10,970 views/month).[2]

Key Facts

  • Discoverer or inventor: Sir George Stokes, 1st Baronet[3]
  • Instance of: mathematical concept[4]
  • Named after: Osborne Reynolds[5]
  • Subclass of: characteristic number[6], dimensionless number in fluid mechanics[7]
  • Commons category: Reynolds number[8]
  • Appointed by: Arnold Sommerfeld[9]
  • Time of earliest written record: 1883[10]
  • Described by source: ISO 80000-11:2019 Quantities and units — Part 11: Characteristic numbers[11]
  • Published in: An Experimental Investigation of the Circumstances Which Determine Whether the Motion of Water Shall Be Direct or Sinuous, and of the Law of Resistance in Parallel Channels[12]
  • Different from: Reynolds electric number[13], magnetic Reynolds number[14]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[15]
  • Maintained by WikiProject: WikiProject Mathematics[16], WikiProject Fluid dynamics[17]
  • Recommended unit of measurement: 1[18]

Why It Matters

Reynolds number has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[19] It is known by 50 alternative names across languages and contexts.[20]

Related Entities

Arnold Sommerfeld Osborne Reynolds Sir George Stokes, 1st Baronet

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [3] ↑ . Retrieved . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . Retrieved . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . ISO 80000-11:2019 Quantities and units — Part 11: Characteristic numbers. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] ↑ . Wikidata sitelinks. wikidata.org.
  3. [20] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Reynolds number. Retrieved October 14, 2026, from https://4ort.xyz/entity/reynolds-number
MLA “Reynolds number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 14 Oct. 2026, https://4ort.xyz/entity/reynolds-number.
BibTeX @misc{4ortxyz_reynolds-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Reynolds number}}, year = {2026}, url = {https://4ort.xyz/entity/reynolds-number}, note = {Accessed: 2026-10-14}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Reynolds number — https://4ort.xyz/entity/reynolds-number (retrieved 2026-10-14)

Canonical URL: https://4ort.xyz/entity/reynolds-number · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 14w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → ['3elrQP', '2R5KQl', '1mWp8y']
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  2. 20w ago · Twofivesixbot bot · 2026-05-24 view diff on Wikidata ↗
    Recommended unit of measurement → 1
    Instance of → index number, mathematical concept
    Maintained by wikiproject → WikiProject Mathematics, WikiProject Fluid dynamics
    Named after → Osborne Reynolds
    + 11 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|3 */ National library of israel j9u id: 987007536463305171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.