Finite element thermomechanical simulation of droplets impacting on a rigid substrate
- Univ. di Trento (Italy). Dipt. di Informatica e Studi Aziendali
- Univ. of Stuttgart (Germany). Inst. for Computer Applications
The plasma spray process is a convenient way to coat a piece of material with a layer of another material, to protect the first from thermal shock or environmental degradation. Finite Element simulation techniques (FEM) for the spreading process of a ceramic liquid droplet impacting on a flat cold surface have been developed. The goal of the present investigation is (1) to predict the geometrical form of the splat as a function of process parameters, such as initial temperature and velocity, and (2) to follow the thermal field developing in the droplet up to solidification. A non-linear finite element procedure has been extended in order to model the complex physical phenomena involved in the impact process. The dynamic motion of the viscous melt in the drops as constrained by elastic surface tensions in interaction with the developing contact with the target, ultimately has been coupled to transient thermal phenomena accounting also for the solidification of the material. In a first model description, spherical particles of liquid ceramic of given temperature and velocity impact on a flat, cool rigid surface. The deformation of the splat geometry as well as the evolution of the thermal field within the splat are followed up to the final state and require adaptive discretization techniques. The authors discuss an utilization of the proposed model in correlating flattening degrees with the initial process parameters.
- OSTI ID:
- 82875
- Report Number(s):
- CONF-940113-; ISBN 0-7918-1190-5; TRN: IM9533%%333
- Resource Relation:
- Conference: 17. American Society of Mechanical Engineers (ASME) energy-sources technology conference and exhibition (ETCE), New Orleans, LA (United States), 23-26 Jan 1994; Other Information: PBD: 1994; Related Information: Is Part Of Materials and design technology -- 1994. PD-Volume 62; Kozik, T.J. [ed.] [Texas A and M Univ., College Station, TX (United States)]; PB: 395 p.
- Country of Publication:
- United States
- Language:
- English
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