TU Darmstadt / ULB / TUbiblio

Modeling and simulation of the disintegration process in ultrasonic standing wave atomizers

Reipschläger, O. and Bothe, D. and Monien, B. and Prüss, J. and Weigand, B. and Warnecke, H.-J.
Lozano, A. (ed.) (2002):
Modeling and simulation of the disintegration process in ultrasonic standing wave atomizers.
In: Proc. 18th Annual Conf. Liquid Atomization and Spray Systems, ILASS-Europe, [Conference or Workshop Item]

Item Type: Conference or Workshop Item
Erschienen: 2002
Editors: Lozano, A.
Creators: Reipschläger, O. and Bothe, D. and Monien, B. and Prüss, J. and Weigand, B. and Warnecke, H.-J.
Title: Modeling and simulation of the disintegration process in ultrasonic standing wave atomizers
Language: English
Title of Book: Proc. 18th Annual Conf. Liquid Atomization and Spray Systems
Publisher: ILASS-Europe
Divisions: 04 Department of Mathematics > Mathematical Modelling and Analysis
UNSPECIFIED
Zentrale Einrichtungen
04 Department of Mathematics
Date Deposited: 20 Apr 2011 13:35
Alternative Abstract:
Alternative abstract Language
A numerical approach based on 3D Computational Fluid Dynamics (CFD) for the simulation of the interfacial dynamics during the disintegration process of liquid in a resonant ultrasonic field is presented. Because of different length- and timescales of the nonlinear sound field and droplet dynamics phenomena, a decoupling is necessary for numerical feasibility. In a first step oscillating pressure- and velocity fields of the ultrasonic fields are computed. Direct Numerical Simulations of the disintegration process are then performed with an advanced Volume of Fluid (VOF) – method. The latter is extended by interfacial momentum source terms, taking into account ultrasonic forces, which lead to disintegration of the liquid phase. To resolve the small-sized fluid structures numerically, very fine computational grids are necessary. Therefore, numerical simulations are performed with parallel computing techniques. Disintegration inside the ultrasonic field is investigated experimentally with high-speed photography. For comparison purposes between numerical and experimental results, an acoustic levitator is used as a less complex system to study the behaviour of single drops in a resonant sound field. Results obtained from numerical computations will serve for optimisation of the ultrasonic standing wave atomization (USWA) technique used for powder coating production and for application of fluid coatings of high viscosityEnglish
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item