drying technique performed at 75 °C, approximately 2.5 times less than
the oven drying technique for the beef and chicken meat samples.
As seen from the results, US treatment accelerated the drying process of
both meat samples.
Ultrasound treatment modified the diffusion
boundary layer due to pressure variations, oscillating viscosities and
microstreaming at the interfaces.
Agitation in the fluid produced by ultrasound can decrease the external resistance
to mass transfer by increasing bulk transportwithin the sample.
Moreover, US waves can cause a series of compressions and expansions of the sample,
which results in pressure changes in solid material.
The sponge effect produced as a result of these pressure changes accelerates removal of the moisture from the inside part of the sample.
In addition, compressions and expansions of the material can produce micro-channels appropriate for fluid movement. All these factors