Modeling of droplet/wall interaction based on SPH method
Modeling of droplet/wall interaction based on SPH method
复制标题
基于SPH方法的液滴/壁相互作用建模
DOI：
10.1016/j.ijheatmasstransfer.2016.09.103
复制
发表时间：
2017-02
影响因子：
5.2
通讯作者：
M.F. Yao
中科院分区：
文献类型：
--
作者：
T.Y. Ma;F. Zhang;H.F. Liu;M.F. Yao
采用光滑粒子流体动力学（SPH）方法研究了不同壁面条件下燃油液滴的碰撞，提出了一种新的飞溅子模型，计算了不同壁面条件下燃油液滴的飞溅质量分数，并与实验结果进行了比较。在不同的初始和边界条件下，研究了撞击后液滴形状的时间演化。发现当液滴撞击相对平滑的干燥表面时，很少发生飞溅。壁膜对液滴飞溅起着重要的作用。一方面，薄膜减缓了液滴的铺展过程，并将能量传递到冠部，使其更容易飞溅;另一方面，入射能量在液滴穿过薄膜时被耗散。结果表明，当无因次壁膜（hnd）小于0.5时，飞溅质量分数较高，容易形成二次液滴。进一步增加，分数下降，更多的膜部分飞溅。在湿壁工况下，利用数值计算数据和实验数据对飞溅子模型进行了拟合和修正。结果表明，该模型可以预测飞溅质量和二次液滴作为一个函数的W。
Fuel droplet impingement on different wall conditions have been studied using Smoothed Particle Hydrodynamics (SPH) method, and a new splashing sub-model is proposed based on numerical results to calculate the splashing mass fraction of the incident droplet and compared with experimental results. Temporal evolution of the droplet shape after impingement is studied with various initial and boundary conditions. It is found that few splashes take place when the drop hits a relatively smoothed dry surface. Wall film plays a great role on droplet splashing. On one hand, the film slows down the droplet spreading process and transmits the energy to the crown part, making it easier to splash; on the other hand, the incident energy is dissipated when the drop moves through the film. The result shows that when non-dimensional wall film (hnd) is less than 0.5, the splashing mass fraction is relatively high and secondary droplets are easier to form. Further increasehnd, the fraction goes down and more film part splashes. The splashing sub-model is fitted and modified using numerical data and experimental data in a wet wall case. The result shows that the splashing mass and secondary droplets can be predicted as a function ofWeusing the proposed sub-model.
登录
查看更多内容
DOI：
10.1016/s0017-9310(98)00054-4
发表时间：
1998-10
影响因子：
5.2
作者：
D. Stanton;C. Rutland
通讯作者：
D. Stanton;C. Rutland
影响因子：
1
作者：
M. Jia;Z. Peng;M. Xie;R. Stobart
通讯作者：
M. Jia;Z. Peng;M. Xie;R. Stobart
影响因子：
4.6
作者：
Roisman, Ilia V.;Horvat, Kristijan;Tropea, Cam
通讯作者：
Tropea, Cam
影响因子：
7.5
作者：
C. Rodrigues;Jorge M M Barata-Jorge-M-M-Barata-70671413;André R. R. Silva-André-R.-R.-Silva-48404723
通讯作者：
C. Rodrigues;Jorge M M Barata-Jorge-M-M-Barata-70671413;André R. R. Silva-André-R.-R.-Silva-48404723
DOI：
10.1016/s1540-7489(02)80079-7
发表时间：
2002
期刊：
--
影响因子：
--
作者：
J. Egermann;M. Taschek;A. Leipertz
通讯作者：
J. Egermann;M. Taschek;A. Leipertz