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Author: Zev Levin Publisher: ISBN: Category : Languages : en Pages : 110
Book Description
This report summarises results of the coalscence efficiency of colliding drops which were obtained from laboratory experiments and a theoretical model. Both theory and experiment suggest that the coalescence efficiency is a function of both drop radii and drop size ratio. Even though no clear dependence of coalescence efficiency on impact speed was observed experimentally, the theory does predict some dependence on velocity. Generally it is observed that the coalescence efficiency decreases with increase in the size of the large drop, R(L), and the drop size ratio, p. However, for small R(L) a decrease in the efficiency was also shown. Both theory and experiment demonstrate the strong dependence of coalescence on impact angle. From the experiments two empirical equations were obtained which relate the coalescence efficiencies and partial coalescence efficiencies with p and R(L). These could be used in numerical models of cloud and rain development. (Author).
Author: Zev Levin Publisher: ISBN: Category : Languages : en Pages : 110
Book Description
This report summarises results of the coalscence efficiency of colliding drops which were obtained from laboratory experiments and a theoretical model. Both theory and experiment suggest that the coalescence efficiency is a function of both drop radii and drop size ratio. Even though no clear dependence of coalescence efficiency on impact speed was observed experimentally, the theory does predict some dependence on velocity. Generally it is observed that the coalescence efficiency decreases with increase in the size of the large drop, R(L), and the drop size ratio, p. However, for small R(L) a decrease in the efficiency was also shown. Both theory and experiment demonstrate the strong dependence of coalescence on impact angle. From the experiments two empirical equations were obtained which relate the coalescence efficiencies and partial coalescence efficiencies with p and R(L). These could be used in numerical models of cloud and rain development. (Author).
Author: G. J. WOFFINDEN Publisher: ISBN: Category : Languages : en Pages : 31
Book Description
An experimental apparatus is being developed for producing droplets 30 to 500 microns in diameter which will impact in mid-air. The coalescence process will be studied with high-speed photography. (Author).
Author: C. D. Hendricks Publisher: ISBN: Category : Raindrops -- Languages : en Pages : 18
Book Description
The coalescence of two colliding water drops was studied by determining the surface deformation of the half-drops before coalescence in a controlled atmosphere. The surface deformation and delay time before coalescence were determined at two impact velocities, at approximately zero, 50 and 97 percent relative humidity, and at an ambient temperature of approximately 27C. The experimental results indicate that the delay time before coalescence increases with higher humidities in both the slow and rapid collisions. At the same humidity and temperature the delay time is less in the slow collision than in the rapid collision. An electric potential difference between the drops decreases the delay time in coalescence and greatly affects the surface deformation. (Author).
Author: Zev Levin
Author: Zev Levin
Author: Richard Gerard Semonin
Author: C. H. Hendricks
Author: G. J. WOFFINDEN
Author: 
Author: Kandula Mastanaiah
Author: C. D. Hendricks
Author: Dominador Calalang Canlas
Author: 
Author: Environmental Research Laboratories