scales of eddies

 

 

scales of eddies

Table of Contents

• 1. scales of eddies
  • 1.1. spectral energy

1 scales of eddies

Large eddies	small eddies
T,V, ℓ Reℓ	τ, v, η, Reη
anisotropic	isotropic
k=1/ℓ	k=1/η
E(k) ∝ V2 ℓ	E(k) ∝ v5/4 ε1/4
viscous effects are regligible, dominated by inertial effects	intertial and viscous effects are of equal strenth
Reℓ (1e3-1e6)	length scale ratio, η/ℓ = Reℓ-3/4
	time scale ratio, τ/T = Reℓ -1/2
	velocity- scale ratio, v/V = Reℓ-1/4

η ~ 0.1-0.01mm

1.1 spectral energy

fig.3.3 H.K. Versteeg

Author: kaiming

Created: 2019-07-07 Sun 20:53

Emacs 24.5.1 (Org mode 8.2.10)

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