Institute for Liquid Atomization and Spray Systems
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The Institute for Liquid Atomization and Spray Systems, (ILASS), is an organization of researchers, industrial practitioners and students engaged in professional activities connected with the spraying of liquids and slurries. Annual technical conferences are organized by each of the ILASS organizations ILASS-Americas, ILASS-Asia, and ILASS-Europe. ILASS-International is board made up of representatives from the three regional ILASS Institutes.
ILASS meetings have practitioner and researchers from many areas where spray technology is utilized. This includes injectors for gas turbines, rockets, and diesels, agricultural and medical sprays, industrial sprays, fire protection, paint and coating applications, liquid combustion, and many others. This breadth of spray applications at this conference and technical community provides cross-fertilization of research methodologies and innovative efforts. Mechanical, agricultural and chemical engineers all participate in these meetings.
The ILASS (Institute for Liquid Atomization and Spray Systems) organization is an international organization dedicated to the advancement of knowledge and technology in the field of liquid atomization and spray systems.
The ILASS global organization has three branches: ILASS-Europe, ILASS-Americas, and ILASS Asia. ILASS-Europe was the first to be established, and was founded in 1982 as initiative of the late Prof. Paul Eisenklam. The first Annual General Meeting took place at UMIST 1983. The Institute’s objectives have remained unchanged since that time: “… to promote the science and applications of liquid atomization and spray systems by means of sponsorship of annual scientific meetings, promotion and preparation of technical papers, and promotion of membership in ILASS Europe among interested and qualified persons…”
Prof. Chigier
Prof. Norman Chigier, one of the leaders of the atomization and spraying systems community and the ILASS organization founded in 1991 the Atomization and Sprays Journal that focuses publishing, peer-reviewed papers on the topics that are central to ILASS.
ILASS organizes conferences, and symposia annually in each of its branches, and every three years, three regional ILASS institutes gather in a joint conference, entitled ICLASS (International Conference of Liquid Atomization and Spray Systems).
Prof. Lefebvre
Three awards are granted at each conference, honouring Professor Paul Eisenklam, Professor Arthur H. Lefebvre, and Professor Y. Tanasawa.
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A spray nozzle or atomizer is a device that facilitates the dispersion of a liquid by the formation of a spray. The production of a spray requires the fragmentation of liquid structures, such as liquid sheets or ligaments, into droplets, often by using kinetic energy to overcome the cost of creating additional surface area. A wide variety of spray nozzles exist, that make use of one or multiple liquid breakup mechanisms, which can be divided into three categories: liquid sheet breakup, jets and capillary waves. Spray nozzles are of great importance for many applications, where the spray nozzle is designed to have the right spray characteristics.
Arthur Henry Lefebvre was a British scientist and an innovative leader in the science and engineering of fuel sprays and combustion in gas turbines.
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Ultrasonic nozzles are a type of spray nozzle that use high frequency vibrations produced by piezoelectric transducers acting upon the nozzle tip that create capillary waves in a liquid film. Once the amplitude of the capillary waves reaches a critical height, they become too tall to support themselves and tiny droplets fall off the tip of each wave resulting in atomization.
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Atomization and Sprays is an international peer-reviewed scientific journal published monthly by Begell House. Founded by Norman Chigier in 1991, it presents original archival-quality research on the physical structure of liquids undergoing breakup and on their interaction with gaseous flow and solid surfaces. Currently it is the only journal that focuses exclusively on atomization and sprays, covering work on theoretical, computational and experimental aspects of the subject.
A spray is a dynamic collection of drops dispersed in a gas. The process of forming a spray is known as atomization. A spray nozzle is the device used to generate a spray. The two main uses of sprays are to distribute material over a cross-section and to generate liquid surface area. There are thousands of applications in which sprays allow material to be used most efficiently. The spray characteristics required must be understood in order to select the most appropriate technology, optimal device and size.
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Patternation is the specialized technical art of performing quantitative measurements of specific properties of particles within a spray and visualizing the patterns of this specific property within the spray. In order to understand patternation, we need to consider the role sprays play in our daily lives.
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Rotary atomizers use a high speed rotating disk, cup or wheel to discharge liquid at high speed to the perimeter, forming a hollow cone spray. The rotational speed controls the drop size. Spray drying and spray painting are the most important and common uses of this technology.
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