Investigation on particle sedimentation using dissipa-tive particle dynamics methods

Mathematical and numerical models for the dissipative particle dynamics were introduced, including the governing equations for the motions of fluid particles, boundary conditions and numerical methods. The codes were programmed to simulate the particle sedimentation under the force of gravity. The effects of the particle's mass and gravity force on the particle's movement trace were revealed. The results show that, the less the mass and gravity force are, the stronger the randomness of particle's movement is. The adopted mathematical model and calculation algorithm were validated. This shows the feasibility and potential predominance of the method proposed in the paper for the numerical simulation of complex fluid flow.