Applications of ultrasonics

Since this article is written primarily for physicists, we shall omit the discussion of any specifically chemical effects of . Ultrasonics : Applications and Processes. Please click at the items of the following list for more information . Most medical applications of ultrasound are based on the properties of longitudinal waves in the frequency range 1-MHz. The relevant plane-wave equations are given, and the methods of production, the form .

Mechanical devices include gas-driven, or pneumatic, transducers such as whistles as well as liquid-driven transducers such as hydrodynamic oscillators and vibrating blades.

This review focuses on the applications of ultrasound to accelerate processes such as dehydration, drying, freezing and thawing, tenderization of meat, crystallization .

Prensentation is done by NITHIYANANDHAM, o First year ECE, NANDHA ENGINEERING COLLEGE, ERODE. Research into the use of ultrasonics for medical diagnosis began after WWII. It is arguably the best of all ultrasonic medical applications , particularly for prenatal ultrasound . Striking have been reported and although many of them have yet to be evaluated economically, they are nevertheless indicative of future . As one of the advanced food technologies it can be applied to develop gentle but targeted processes to improve the quality and safety of processed foods and offers the potential for . Some of the simplest ultrasonic applications build on the fact that the upper range of audibility for human beings is relatively low among animals.

Cats, by comparison, have an infrasound threshold only slightly higher than that of humans (1Hz), but their ultrasound range of audibility is much greater— 30Hz instead of . The word ultrasonic combines the Latin roots ultra, meaning beyon and sonic, or sound. The field of ultrasonics thus involves the use of sound waves outside the audible range for humans. Like most innovative food processing technologies, high-power ultrasonics is not an off-the-shelf technology, and thus requires careful development and scale-up for each and every application.

The objective of this chapter is to present examples of ultrasonic applications that have been successful at the commercialization . Cutting and matching of hard materials. Industrial Applications of High Power. Since the change of the millennium, high-power ultrasound has become an alterna- tive food processing technology applicable to large-scale commercial applications such as emulsification, homogenization, extraction, . The application of ultrasonic energy can increase the flux by breaking the concentration polarisation and cake layer at the membrane surface without affecting the intrinsic permeability of membrane (Fig.

1). The liquid jet serves as the basis for cleaning, and some other cavitational mechanisms lead to particle release from . Institute of Paper Science and Technology. Abstract: In this paper, the physical mechanism of ultrasonic treatment and its applications in medicine are analyzed. First, the biological effect of medical ultrasound in ultrasonic therapy is elaborate and its action in treating some related diseases is analyzed. Some newly-developed ultrasonic therapy technologies and . A particularity of civil engineering application is the large size of the survey zones and the expected low cost of inspection.

APPLICATIONS OF ULTRASONICS IN THE WATER INDUSTRY. In this context non contact ultrasonics may offer the possibility to built robots that can automatically scan large areas (or eventually be integrated in moving vehicles) to recover mechanical properties of . Abstract: The first applications in power ultrasonics were largely focused on ultrasonic cleaning baths, which rely on generating inertial cavitation, and the incorporation of ultrasonic excitation in manufacturing processes such as joining of plastics and metals.