Sahooley 



0/0' 

 40 25 



.00001 



.OOOt .001 .01 



DIFFUSIVITY OF NoCI IN WATER, D' (cm^/sec) 



Fig. 5. Thermal dlffuslvity D vs. diffusivity of NaCl in water D' 

 for zero turbulence at lower left, and increasing turbulence 

 toward the upper right. 



V. DISCUSSION OF RESULTS 



Figure 5 shows thermal diffusivity D vertically, and salt 

 diffusivity D' horizontally. The point marked (X) at the lower 

 left represents the handbook values for the two molecular diffusivities. 

 The nearby circular point was determined experimentally when the 

 mixer of Fig. i was not used. The point nearest the center of Fig. 5 

 is an average of four experiments using turbulence #1 as listed in 

 Table I. The maximum deviations from the mean are shown. The 

 upper right point is for turbulent condition #2. The mean value was 

 derived from seven experiments. Again maximum deviations from 

 the mean are shown. 



In Fig. 5 a straight line has been drawn connecting the 

 molecular diffusivity point with the point of maximum eddy diffusivity. 

 The intermediate point Is somewhat below this line but there Is 

 clearly not enough experimental data to deternnlne the shape of the 

 curve. At the top of Fig. 5 a scale shows how the ratio of D/D' 

 decrease with Increasing turbulence. 



Turbulence In a stratified fluid manifests Itself In two ways. 



318 



