This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Therefore the uncertainty (noise) in the mean decreases by a factor of 10 when the number of averaged cycles is increased to 10,000 from 100. The signal-to-noise ratio increases by a factor of 10. b) See the graph of C D vs Re d for spheres given in lecture 4. The transition from laminar to turbulent occurs at about 2-3x10 5 . 4. mdv/dt=mg-F d-F b = mg - 3πdμv - (4π/3)(d/2) 2 ρg dv/dt + (3πdμ/m)v + πd 3 ρg/6m – g = 0 λ = 3πdμ/m α = g - πd 3 ρg/6m v = (α/λ) [1 – exp(-λt)] V t = α/λ = [g - πd 3 ρg/6m]m/3πdμ Re d =ρV t d/μ ≤ 1 for Stokes flow; V t ≤ μ/ρd...
View Full Document
This note was uploaded on 09/27/2010 for the course A&EP 264 at Cornell University (Engineering School).