ICCM Conferences, The 6th International Conference on Computational Methods (ICCM2015)

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Keynote: Simulations of the Interaction of Compressible Droplet Impaction on Walls based on the Two-Fluid Model
Yang-Yao Niu

Last modified: 2015-09-28

Abstract


In this paper, we investigated a droplet impingement to a rigid wall using a two-phase interface capturing Eulerian-Eulerian approach. A hybrid type Riemann solver is proposed to compute the phenomena of compressible high-speed water droplet impingement on a rigid wall. As we know. an accurate resolution of multi-scale phenomena such as material interfaces, contact surfaces and discontinuities due to the interaction among multi-phase flows which is still an unsolved problem. In this work, a  six equation two-fluid approach with the stratified flow model  are selected  to model  liquid-gas flows based on individual equation of state. In the flowfield we considered, the high Reynolds number value allowed to use an inviscid approach to the problem. Also, the high Weber number was an assumption to neglect the surface tension effect. Numerical results demonstrated the evolution of shock-front, rarefaction, cavitation inside the droplet and the contact periphery expands very quickly and liquid compressibility plays an important role in the initial dynamics and the formation of lateral jets.


Keywords


Two-fluid model, Riemann Solver, Two-phase Flow. Compressible Water Droplet

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