INVESTIGATION OF THE PROCESS OF DRYING
OF A SYSTEM OF CONNECTED CAPILLARIES
IN AN ACOUSTIC-CONVECTIVE FIELD

Yu. G. Korobeinikov, A. P. Petrov,
G. V. Trubacheev, and A. V. Fedorov

UDC 532.72;669.015.23

A study has been made of the process of drying of a model 
specimen with a system of capillaries connected via a slot space; 
the specimen is located in an intense acoustic-convective field. The 
film-dropwise mechanism of extraction of water from the specimen's 
system of capillaries has been video-recorded. It has been established 
that the difference of the acoustic pressures in the external flow 
and inside the cavity of the specimen is one motive force of this 
process. It has been shown that a vortex gas motion pulsating with 
the frequency of the acoustic field and under whose action the liquid 
breaks down into droplets is formed in the capillaries-slot space 
system in the acoustic-convective regime. Such phenomena have not 
been observed in the convective regime of drying. The influence of 
the frequency and amplitude of oscillations of the acoustic field 
on the rate of drying of the specimen has been studied.

S. A. Khristianovich Institute of Theoretical and Applied Mechanics, 
Siberian Branch of the Russian Academy of Sciences, 4/1 Institutskaya Str., 
Novosibirsk, 630090, Russia; email: Fedorov@itam.nsc.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 6, 
pp. 1097-1101, November-December, 2008. Original article 
submitted November 19, 2007.