期刊
COMPUTATIONAL MECHANICS
卷 53, 期 5, 页码 977-999出版社
SPRINGER
DOI: 10.1007/s00466-013-0943-7
关键词
SPH; XPP model; Weissenberg number; Droplet impact
资金
- Natural Science Fundamental Research Project of Jiangsu Colleges and Universities of China [12KJD570001]
- Jiangsu Natural Science Foundation for Youths of China [BK20130436]
In this paper, the spreading process of two XPP model droplets impacting on a plate in sequence at low Reynolds number is numerically simulated by using an improved smoothed particle hydrodynamics (I-SPH) method. The I-SPH method is a coupled approach which uses the traditional SPH (TSPH) method near the boundary domain and uses a kernel-gradient-corrected SPH method in the interior of fluid flow for the reason of remedying the accuracy and stability of TSPH. Meanwhile, an artificial stress term and a periodic density re-initialization technique are presented to eliminate the tensile instability and restrain pressure oscillation, respectively. A new boundary treatment is also adopted. The ability and merit of proposed I-SPH method combined with other techniques are first illustrated by simulating three typical examples. Subsequently, the deformation phenomena of two viscoelastic droplets impacting and spreading on a plate in sequence are numerically investigated. Particularly, the influences of the falling time interval, Weissenberg number and other rheological parameters on the deformation process are studied respectively. All numerical results agree well with the available data.
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