Utrasonic topic: "ultrasonic cavitation"
Ultrasonic cavitation, also acoustic cavitation, describes the generation of intense cavitation by means of power ultrasound. When high power, low frequency ultrasound waves are coupled into liquid, alternating high-pressure / low-pressure cycles occur. During those alternating pressure cycles minute vacuum bubbles or gas pockets are generated. After the initial formation of the cavitation bubble, subsequent cavity dynamics involve growth and finally the collapse of the vacuum bubble. The cavities grow over several cycles until they reach a point, when the vacuum bubble cannot absorb more energy, so that the void implodes violently. During the bubble collapse, locally extreme energy-dense conditions occur. In these cavitational “hot spots”, temperature of up to 5000K, pressures of up to 2000atm, corresondingly high temperature and pressure differentials as well as liquid jets with up to 120m/s.
These intense forces are used for manifold applications such as homogenization, emulsification of two or more immiscible phases, dispersion and deagglomeration of (nano-)particles, wet-milling, cell lysis, extraction, leaching, sonochemical reactions and many more.
Hielscher Ultrasonics is specialized in the development and manufacturing of high-performance ultrasonic processors and reactors. Covering the whole range from lab, bench-top and industrial ultrasonic systems, Hielscher can offer you the most suitable ultrasonic processor for your application and process target.
Read more about acoustic cavitation and its applications in lab, R&D and industry!
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Power generators, ship engines and railway engines, which are fuelled with diesel, can be run more efficiently when water-in-diesel emulsions are used. Water-diesel emulsion fuels reduce the fuel consumption, lower the combustion temperature, burn cleaner and reduce emissions, such…https://www.hielscher.com/ultrasonic-emulsions-for-water-in-diesel-combustion.htm
To exploit the exceptional functionalities of carbon nanotubes (CNTs), they must be homogeneously dispersed. Ultrasonic dispersers are the most common tool to distribute CNTs into aqueous and solvent-based suspensions. The ultrasonic dispersing technology creates sufficiently high shear energy to…https://www.hielscher.com/uniformly-dispersed-nanotubes-by-sonication.htm
Chitosan is a chitin-derived biopolymer which has many applications in pharma, food, agriculture and industry. Ultrasonic deacetylation of chitin to chitosan intensifies the treatment significantly - leading to an efficient and fast process with a high chitosan yield of…https://www.hielscher.com/ultrasonic-deacetylation-of-chitin-to-chitosan.htm
Research has shown that ultrasonic milling can be successfully used for fabrication of thermoelectric nanoparticles and has the potential to manipulate the surfaces of the particles. Ultrasonically milled particles (e.g. Bi2Te3-based alloy) showed a significant size reduction and fabricated…https://www.hielscher.com/ultrasonic-milling-of-thermoelectrical-nano-powders.htm
Ultrasonic terpene extraction has been proven to give high yields of terpene caryophyllene oxide, e.g. from cannabis and hops. Caryophyllene oxide is a terpene found in cannabis, hops, pepper, basil and rosemary. As an active compound, extracted terpene caryophyllene…https://www.hielscher.com/ultrasonic-terpene-extraction.htm
Curcumin is a pharmacological and nutritional phytochemical present in the rhizomes of Curcuma longa. For high extraction yield, sonication is the most efficient technique. Ultrasonic extraction results in high quality, high yield and requires only short processing time. …https://www.hielscher.com/ultrasonic-cucurmin-extraction.htm
Ultrasonic cavitation is a highly effective mechanical method to isolate stem cells from human adipose tissue. Ultrasonically isolated stromal vascular fraction (SVF) show a high regenerative potential for medical applications. Hielscher Ultrasonics offers various options of direct and indirect…https://www.hielscher.com/ultrasonic-stem-cell-isolation.htm
Drilling fluid (drilling mud) is used to aid the drilling of oil wells, natural gas wells, exploratory wells (wildcat wells) or water wells. Ultrasonic reactors are an effective technology for the mixing, dispersing, emulsification and degassing of water-based mud…https://www.hielscher.com/ultrasonic-mixers-for-drilling-muds-and-packer-fluids.htm
Hielscher manufactures ultrasonic cleaning systems for the removal of contamination, such as lubricants, drawing oil, dust, dirt, soap or stearate from continuous profiles, such as wire, tube, flat strip or cable. USCM - A Modular Cleaning System The USCM…https://www.hielscher.com/ultrasonic-cleaning-modules-for-wire-tube-and-cable.htm
Hielscher Ultrasonics hand-held or stand-mounted ultrasonic probes direct highly intense ultrasonic waves to the openings of wire dies, wire guides, extruder dies, extruder plates or spinnerets. This cleans the fine channels and surfaces in seconds from: oils and fats…https://www.hielscher.com/focused-ultrasonic-probes-for-intense-cleaning.htm
This page is a collection of videos. [arve url="https://www.hielscher.com/flash/up400st-ultrasonic-tea-extraction-p0853x0480.mp4" thumbnail="https://www.hielscher.com/flash/up400st-ultrasonic-tea-extraction-p0853x0480.jpg" title="Ultrasonic Extraction of Cold Brew Tea using the UP400St" description="Cold brew tea is rapidly made by sonication. The UP400St extracts flavour and health-promoting compounds from the tea leaves within…https://www.hielscher.com/hielscher-ultrasonics-videos.htm
Ultrasound is a non-thermal processing method, which is already widely used in the food industry due to its mild application but significant effects on the product. For the wineries, sonication offers various applications such as the extraction of flavours,…https://www.hielscher.com/sonication-of-wine-innovative-applications-of-ultrasound-in-wineries.htm