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Modeling of liquid-wall interaction using the Smoothed Particle Hydrodynamics (SPH) method

Modeling of liquid-wall interaction using the Smoothed Particle Hydrodynamics (SPH) method
Tagung:

ILASS Europe, 26th Annual Conference on Liquid Atomization and Spray Systems

Tagungsort:

Bremen, Germany

Datum:

08.09.2014 - 10.09.2014

Autoren:

Wieth, L.
Braun, S.
Koch, R.
Bauer, H.J.

A fully three-dimensional, meshless code based on the Lagrangian Smoothed Particle Hydrodynamics (SPH) method has been developed and validated with the aim to numerically simulate technical relevant processes of gas turbines, especially the primary atomization of liquid fuel. For a more physical modeling of this process, the liquid-wall interaction has to be taken into account. The present paper proposes an extension of the interfacial tension model in use. This model is based on the normal vector correction in the framework of the Continuum Surface Force (CSF) model.

The interaction model was validated by simulating static as well as dynamic contact angles. The two- and three dimensional static contact angle simulations of a water droplet sitting on a wall surrounded by air, agree well to the theory. For the validation of the dynamic contact angle behavior, experiments conducted by Lam et al. were reproduced numerically. Here, too the simulations showed a good agreement with the experimental findings. It is concluded, that the proposed model is capable to numerically represent the liquid-wall interaction, which is a important step towards the numerical simulation of the atomization process.