Bagnold number

noun

The ratio of grain collision stresses to viscous fluid stresses in a granular flow with interstitial Newtonian fluid: Ba=(ρd²λ^(1/2)̇γ)/μ, where ρ is the particle density, d is the grain diameter, ̇γ is the shear rate, μ is the dynamic viscosity of the interstitial fluid and λ is the linear concentration.

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Meanings

nounBagnold number (plural Bagnold numbers)

plural Bagnold numbers

  1. uncommonnatural sciencesThe ratio of grain collision stresses to viscous fluid stresses in a granular flow with interstitial Newtonian fluid: Ba=(ρd²λ^(1/2)̇γ)/μ, where ρ is the particle density, d is the grain diameter, ̇γ is the shear rate, μ is the dynamic viscosity of the interstitial fluid and λ is the linear concentration.

Origin

Named after Ralph Bagnold.

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Cite this entry
APA

Bagnold number. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Bagnold%20number

MLA

“Bagnold number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Bagnold%20number. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Bagnold number,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Bagnold%20number.

Source: Bagnold number on Wiktionary, CC BY-SA 4.0.