The Theoretical and Experimental Study of the Behavior of the Mercury Drop, Fixed on the Glass Bottom of Vessel with Fluid, Under the Acceleration of Gravity Change

Abstract

At present time, accumulated theoretical material of the studies of the equilibrium forms of the gas bubbles or mercury drops, fixed on the surface of solid material in the fluid or on the glass bottom of vessel with fluid, under the acceleration of gravity change, was carried out either on the basis of geometric similarity laws that greatly simplify the essence of physical processes, or on the basis of theoretical qualitative estimates of the existing hydrostatic equations of fluid equilibrium, taking into account a decrease of the acceleration of gravity, without carrying out a numerical solution of these equations. The theoretical and experimental study of the behavior of gas bubbles, fixed on the surface of solid material in the fluid, under the acceleration of gravity change was carried out by Shoikhedbrod with great computer accuracy and experimentally confirmed during flight tests aboard of the IL-76K flying laboratory. The paper presents the application of previously obtained results for modeling of the behavior of a drop of mercury, fixed on the glass bottom of vessel with fluid, under the acceleration of gravity change. The conducted computer modeling of the behavior of a drop of mercury, fixed on the glass bottom of vessel with fluid, under the acceleration of gravity decrease, experimentally proved during the process of the carried out tests aboard of the flying laboratory (FL) IL-76K, showed the practical use of the developed computer model both for the simulation of the behavior of real gas bubbles and mercury drops in the fluid in one vessel of the wide range of Bond numbers (β) in the chemically-technological processes occurring in the main control systems of the operability of automatic spacecraft, in real conditions of microgravity.