Krishnamurti 



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X20 



18- 



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 UJ 16 



X 



14 

 12 

 10 

 80 



6.0- 

 4.0 



2.0 



HEAT FLUX vs RAYLEIGH NUMBER 

 SHOWING THE SECOND TRANSITION. 

 PRANDTL NUMBER = 860 



RAYLEIGH NUMBER xio" 



Fig. 5a. Heat flux plotted against Rayleigh number showing the 



second transition. Photographs show the corresponding 

 change in plan form. The Prandtl number is 860, 



298 



