The lattice Boltzmann method is widely used in solving hydrodynamics for various systems.The accuracy of the extrapolation method for boundary conditions and Mei’s method for curved boundary is not high enough.We pro...The lattice Boltzmann method is widely used in solving hydrodynamics for various systems.The accuracy of the extrapolation method for boundary conditions and Mei’s method for curved boundary is not high enough.We propose a modified extrapolation method for boundary conditions.Numerical simulations conform the higher accuracy and stability compared with the other methods.展开更多
Fractional propagation is used to reduce the spurious velocities for multiphase lattice Boltzmann models.The numerical results show that the maximum spurious velocity at the interfaces could be reduced effectively in ...Fractional propagation is used to reduce the spurious velocities for multiphase lattice Boltzmann models.The numerical results show that the maximum spurious velocity at the interfaces could be reduced effectively in comparison with some o1 the early models.Eight spurious eddies,which previously existed in the D2Q9 model at the interfaces of two-phase flows,are completely eliminated.Simulations are used to confirm these results using different parameters.展开更多
A single-phase free surface tracking model based on the Lattice Boltzmann Method （LBM）, which has capability of simulating liquid-gas system with the assumption that the gas phase has only negligible influence on th...A single-phase free surface tracking model based on the Lattice Boltzmann Method （LBM）, which has capability of simulating liquid-gas system with the assumption that the gas phase has only negligible influence on the liquid phase, is utilized to simulate the flow of a drop impacting on a liquid film. Three typical outcomes in the flows, i.e., deposition, crown and splash, which have been observed in the previous experiments, are obtained in the present three dimensional numerical simulations. The numerical results are consistent with the experimental and analytical results available.展开更多
基金Supported by Shanghai Science and Technology Commission Projects of Leading Scientists and Excellent Academic Leaders under Grand No 11XD1402300Research on Lattice Boltzmann Method for Complex and Moving Boundary Problems under Grant No K.13-0401-13-001 from Shanghai University.
文摘The lattice Boltzmann method is widely used in solving hydrodynamics for various systems.The accuracy of the extrapolation method for boundary conditions and Mei’s method for curved boundary is not high enough.We propose a modified extrapolation method for boundary conditions.Numerical simulations conform the higher accuracy and stability compared with the other methods.
基金Supported in part by the Ministry of Education of China under Grant No IRT0844the Shanghai Science and Technology Commission Projects of Leading Scientists and Excellent Academic Leaders under Grant No 11XD1402300.
文摘Fractional propagation is used to reduce the spurious velocities for multiphase lattice Boltzmann models.The numerical results show that the maximum spurious velocity at the interfaces could be reduced effectively in comparison with some o1 the early models.Eight spurious eddies,which previously existed in the D2Q9 model at the interfaces of two-phase flows,are completely eliminated.Simulations are used to confirm these results using different parameters.
基金the National Natural Science Foundation of China (Grant No. 10472062)the Special Scientific Foundation for Selection and Cultivation of Excellent Young Scholars in Shanghai and the Shanghai Leading Academic Discipline Project (Grant No.Y0103)
文摘A single-phase free surface tracking model based on the Lattice Boltzmann Method （LBM）, which has capability of simulating liquid-gas system with the assumption that the gas phase has only negligible influence on the liquid phase, is utilized to simulate the flow of a drop impacting on a liquid film. Three typical outcomes in the flows, i.e., deposition, crown and splash, which have been observed in the previous experiments, are obtained in the present three dimensional numerical simulations. The numerical results are consistent with the experimental and analytical results available.
