TR No. 22 
For wave numbers greater than K = 0.026 om~t Bk) decreases 
more rapidly with increasing wave number than pe 9» Which reflects at- 
tenuation of the higher wave number variations in velocity because of 
the size of the current meter. At AK = 0:0353 om7t, As ay) is 3 dB 
below the =-5/3 log k line. 
The necessary condition for the existence of the inertial subrange 
can be stated precisely as (Batchelor, 1) 
ie % 
= ) D2? ] (36) 
where u is the RMS value of the turbulent velocity and R is the length 
corresponding to the wave number at which the maximum in the energy spec- 
trum is located. 
Using the values obtained herein: 
cm-sec”_ 
US a 
AS ees 
We 0) 15 sap 1 
this is i 
fils) aes gn 
a value sufficiently large that the condition (12) is probably satisfied. 
Values of the energy spectrum were not obtained at wave numbers large 
enough to allow calculation of the dissipation spectrum Kh, RK) > and 
subsequently the rate of energy dissipation by viscosity 
Es nop? | ers Pa a 
oO 
since dissipation occurs at wave nuinbers of the order of 10 om72 (Grant, 
Stewart and Moilliet, 2). Regardless, if the Kolmogoroff hypothesis is 
assumed, an estimate of the average value of € can be obtained from the 
spectra using 22 
Fd BOE, (k) -p, ga eJk ie of 
(37) 
~% 
25 
