Initially turbulent wakes: Comparisons between Laboratory and Simulation

Towed case:

towed wake evolution, 13<Nt<350
Variable Laboratory Simulation
Fr 11.9 10
Re 18800 10000
U 49.7 cm/s
D 3.82 cm
U/D 13.01 s^-1
D/U 0.07686 s
N 1.1 s^-1


Self-propelled case:

self-propelled wake evolution, 25<Nt<704

Simulation: Re=5000 Fr=5

Laboratory:

Re                           = 38.3 * 10^3              Reynolds number
F                = U/ND      = 6.1                      Froude number
D                            = 7.62 cm                  body diameter
L/D                          = 12.1                     body aspect ratio
D_p                          = 4.6 cm                   propeller diameter
U                            = 50.3 cm/s                body speed
N                            = 1.1 s^-1                 buoyancy frequency
prop rotation speed          = 775 rpm
Advance ratio, J = n D_p / U = 7.4


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Dr. Michael J. Gourlay (www.co-ra.com/~gourlay/research/) / gourlay at colorado-research dot com