THEORETICAL AND APPLIED MECHANICS

 

TEORIJSKA I PRIMENJENA MEHANIKA  2003 Vol.30 (3), pp.177-192

 

 

 

Summary: 

R. Askovic

 
 

 

Drag of a growing bubble at rectilinear accelerated ascension
In pure liquids and binary solutions

 

 

The problem of predicting the drag coefficient of a growing bubble at rectilinear accelerated ascension in uniformly superheated pure liquids and in binary solutions with a non-volatile solute at large Reynolds and Peclet numbers is discussed. In the case of pure liquids, the general solution for the drag coefficient of an accelerated growing bubble from its inception at the critical radius and through the surface-tension-, inertia-, and heat-diffusion-controlled regimes is established, as well as some necessary adaptations in the case of binary solutions with a non-volatile solute. Two particular limiting regimes in the case of pure liquids, inertia-controlled and heat-diffusion-controlled regimes, respectively, are analyzed in details, with satisfactory results.