【摘 要】
：
The behavior of single free falling droplets impinging onto a flat surface has been extensively studied both experimentally and numerically.Nevertheless,conventional numerical methods require the empi
【机 构】
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School of Industrial Engineering,Diego Portales University,Chile
【出 处】
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13th International Conference on Liquid Atomization and Spra
论文部分内容阅读
The behavior of single free falling droplets impinging onto a flat surface has been extensively studied both experimentally and numerically.Nevertheless,conventional numerical methods require the empirical determination of the dynamic liquid-surface contact angle to study the time evolution of the droplet deformation process.Furthermore,the second order and nonlinear characteristics of transport equations increase the computational cost required for the simulations.To avoid these problems,an axisymmetric Lattice Boltzmann Method(LBM)was used to study the deformation process of liquid droplets.In LBM,the convective operator is linear and the pressure is calculated directly by the equation of state without implementing iterative methods,which reduces significantly the CPU time.On the other hand,the implemented Shan–Chen(SC)multiphase Lattice Boltzmann model [1] allows simulating the droplet spreading and receding without the need of previous experimental measurements.In order to properly track the liquid-gas interface throughout the entire computational domain,an improved hierarchical refinement technique was employed.The obtained results agree well with previous studies,demonstrating the capability of LBM to predict the behavior of gas-assisted droplets impingement without increasing the computational requirements.
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