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| Received:December 22, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201603021 |
| KeyWord:fluid mechanics SPH moving boundary ghost particles shock tube |
| Author | Institution |
| 周杰 |
清华大学 航天航空学院, 北京 |
| 徐胜利 |
清华大学 航天航空学院, 北京 |
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| Abstract: |
| In order to study the integral truncation and unphysical penetration on fluid particles,a method of setting moving boundary condition was proposed.During every time step,ghost particles outside the boundaries were generated symmetrically by fluid particles and were given the corresponding physical quantities,in consideration of repulsive force in the ghost particles.By self-compiled SPH program that based on the N-S equation of the Lagrange form,using one-dimensional shock tube to exactly verify boundary conditions,finally to study how the moving boundary conditions were applied in the calculation model.Simulation results of shock tube were basically in line with the exact solutions,and reasonable results also were calculated in moving boundary model.Moving boundary condition was proposed in the paper to avoid the problem of fluid particles integral truncation near the border,and prevent unphysical penetration phenomenon. |
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