The Acoustic Drying Of Cloth In Drum-Type Washing Machines

Pulsation And Explosion Of Vapor-gas
Bubbles Into Capillaries. Decreasing
Liquid Viscosity
• With a increasing acoustic wave intensity a
part of bubbles does not have a time to
collapse in increasing pressure phase. In
the next decreasing pressure phase these
bubbles again swell. The process may to
repeat continuous time. These bubbles
named as “resonant bubbles”
• Pulsation of resonant bubbles in capillaries
excites low-frequency oscillations of
capillary walls and speeding up water
transfer from deep layers to surface
• Explosions of bubbles into capillary also
promote water transfer process
• Cavitation bubbles provides “loosening” of
liquid and, as result, decreasing the
viscosity, that is additional factor of mass
transfer too.
Water
Water
squeeze out
Borders
vibration
Cavitation
bubbles
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