NDLI: Mapping of cavitational activity in a pilot plant dyeing equipment.

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In situ observation and analysis of ultrasonic capillary effect in molten aluminium.

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Sono-bromination of aromatic compounds based on the ultrasonic advanced oxidation processes.

Rapid sonochemical synthesis of novel PbSe-graphene-TiO2 composite sonocatalysts with enhanced on decolorization performance and generation of ROS.

Hysteresis of inertial cavitation activity induced by fluctuating bubble size distribution.

Conversion of carbon dioxide to resorcylic acid under ultrasonication by Kolbe-Schmitt reaction.

Shelf life, physicochemical, microbiological and antioxidant properties of purple cactus pear (Opuntia ficus indica) juice after thermoultrasound treatment.

Microwave-ultrasound assisted synthesis of ß-FeOOH and its catalytic property in a photo-Fenton-like process.

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Effect of ultrasound-assisted freezing on the physico-chemical properties and volatile compounds of red radish.

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Rheological and kinetic study of the ultrasonic degradation of locust bean gum in aqueous saline and salt-free solutions.

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A comparative fluid flow characterisation in a low frequency/high power sonoreactor and mechanical stirred vessel.

Effect of ultrasonic cavitation erosion on corrosion behavior of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC-10Co-4Cr coating.

Sonocatalytic performance of Er-doped ZnO for degradation of a textile dye.

Controlled morphology and size of curcumin using ultrasound in supercritical CO2 antisolvent.

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Sonochemical synthesis of a nano-structured zinc(II) amidic pillar metal-organic framework.

Ultrasonic-accelerated rapid protocol for the improved synthesis of pyrazoles.

Focused ultrasound solid-liquid extraction for the determination of organic biomarkers in beachrocks.

Mapping of cavitational activity in a pilot plant dyeing equipment.

Optimization of ultrasound-assisted extraction of anthocyanins from haskap berries (Lonicera caerulea L.) using Response Surface Methodology.

Simulation of thermal ablation by high-intensity focused ultrasound with temperature-dependent properties.

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MnO2/CeO2 for catalytic ultrasonic decolorization of methyl orange: Process parameters and mechanisms.

Depolymerization using sonochemical reactors: A critical review.

Dehydration kinetics of salmon and trout fillets using ultrasonic vacuum drying as a novel technique.

Ultrasonic-assisted synthesis and structural characterization of two new nano-structured Hg(II) coordination polymers.

Effect of ultrasound on the extraction of total anthocyanins from Purple Majesty potato.

Effects of ultrasonic treatment on zeolite NaA synthesized from by-product silica.

Introduction to this special edition of ultrasonics sonochemistry: 'The 1st Yangtze International Summit of Minimally-invasive and Noninvasive Medicine: Clinical Applications of HIFU (high-intensity focused ultrasound)'.

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Mapping of cavitational activity in a pilot plant dyeing equipment.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Actis Grande, G. Giansetti, M. Pezzin, A. Rovero, G. Sicardi, S.
Description	Author Affiliation: Actis Grande G ( Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy. Electronic address: giuseppe.actis@polito.it.); Giansetti M ( Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.); Pezzin A ( Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.); Rovero G ( Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.); Sicardi S ( Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.)
Abstract	A large number of papers of the literature quote dyeing intensification based on the application of ultrasound (US) in the dyeing liquor. Mass transfer mechanisms are described and quantified, nevertheless these experimental results in general refer to small laboratory apparatuses with a capacity of a few hundred millilitres and extremely high volumetric energy intensity. With the strategy of overcoming the scale-up inaccuracy consequent to the technological application of ultrasounds, a dyeing pilot-plant prototype of suitable liquor capacity (about 40 L) and properly simulating several liquor to textile hydraulic relationships was designed by including US transducers with different geometries. Optimal dyeing may be obtained by optimising the distance between transducer and textile material, the liquid height being a non-negligible operating parameter. Hence, mapping the cavitation energy in the machinery is expected to provide basic data on the intensity and distribution of the ultrasonic field in the aqueous liquor. A flat ultrasonic transducer (absorbed electrical power of 600 W), equipped with eight devices emitting at 25 kHz, was mounted horizontally at the equipment bottom. Considering industrial scale dyeing, liquor and textile substrate are reciprocally displaced to achieve a uniform colouration. In this technology a non uniform US field could affect the dyeing evenness to a large extent; hence, mapping the cavitation energy distribution in the machinery is expected to provide fundamental data and define optimal operating conditions. Local values of the cavitation intensity were recorded by using a carefully calibrated Ultrasonic Energy Meter, which is able to measure the power per unit surface generated by the cavitation implosion of bubbles. More than 200 measurements were recorded to define the map at each horizontal plane positioned at a different distance from the US transducer; tap water was heated at the same temperature used for dyeing tests (60°C). Different liquid flow rates were tested to investigate the effect of the hydrodynamics characterising the equipment. The mapping of the cavitation intensity in the pilot-plant machinery was performed to achieve with the following goals: (a) to evaluate the influence of turbulence on the cavitation intensity, and (b) to determine the optimal distance from the ultrasound device at which a fabric should be positioned, this parameter being a compromise between the cavitation intensity (higher next to the transducer) and the US field uniformity (achieved at some distance from this device). By carrying out dyeing tests of wool fabrics in the prototype unit, consistent results were confirmed by comparison with the mapping of cavitation intensity.
File Format	HTM / HTML
ISSN	13504177
Journal	Ultrasonics Sonochemistry
Volume Number	27
e-ISSN	18732828
Language	English
Publisher	Elsevier
Publisher Date	2015-11-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Diagnostic Imaging
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Environmental Chemistry Acoustics and Ultrasonics Radiology, Nuclear Medicine and Imaging Chemical Engineering Inorganic Chemistry

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