Favre and Coantio 



r LOG(FXSPECT) 



o DEW POINT 

 • LYMAN ALPHA 



•.• LOG(FZ/UJ 



I ^ I 



Fig. 4. Comparison between predicted spectral behavior of turbu- 

 lent humidity fluctuations, and measurements by Miyake 

 and McBean [ 1970] 



5. Two-Phase Processes in the Vicinity of Air-Sea Interface 



The equations governing the mean properties of air- sea inter- 

 actions are usually written in an earth fixed Eulerian frame of refer- 

 ence, and different sets of equations have to be used in the gaseous 

 and in the liquid phase. Due to the unsteady random character of the 

 interface, this means that an appreciable part of the system has, 

 strictly speaking, to be treated as a two-phase flow. 



If one wants to take into account the obviously important 

 effects of sea spray in the lower atmosphere, and of air bubbles in 

 the upper ocean, the necessity of considering two-phase effects is 

 still more clear. Prompted by chemical and nuclear engineering 

 problems, notable progress has been gained these last years in the 

 analytical and ennpirical description of such processes. We plan to 

 apply the methods therein developed to the study of the two-phase 

 portion of the ocean- atmosphere system. 



III. STUDY OF CHARACTERISTICS AND DESIGN OF THE SIMU- 

 LATING FACILITY 



1 . Conditions for Modelling Small-Scale Air-Sea Interactions 



In consequence of the physical mechanisms of air-sea energy 

 exchanges , the planned laboratory experiments will concern the 

 structure of turbulent velocity, temperature and humidity boundary 



44 



