CAJ | 학술논문

介绍了水沙二相流运动的研究现状和SPH法基本原理，阐述了在水沙运动模拟中引入SPH法的可行性，总结了基于SPH法的水沙二相流模拟技术研究进展情况。认为：①通过离散含沙量对流扩散方程，可建立悬沙浓度变化SPH模型，据此可求解从小到大不同尺度的非均匀挟沙水流的含沙量变化，给出“含沙量粒子”的时空变化信息；②基于质点动力学，可建立悬沙粒子运动SPH模型，据此可求解泥沙颗粒在非均匀水流中的小尺度运动方程，给出水沙二相流的时空变化信息。但是，悬沙浓度变化SPH模型的局限在于“含沙量”实质上还是时空平均特征；悬沙粒子运动SPH模型的局限在于目前它只适用于求解SPH粒子总量较少的流动问题。
개소료수사이상류운동적연구현상화SPH법기본원리，천술료재수사운동모의중인입SPH법적가행성，총결료기우SPH법적수사이상류모의기술연구진전정황。인위：①통과리산함사량대류확산방정，가건립현사농도변화SPH모형，거차가구해종소도대불동척도적비균균협사수류적함사량변화，급출“함사량입자”적시공변화신식；②기우질점동역학，가건립현사입자운동SPH모형，거차가구해니사과립재비균균수류중적소척도운동방정，급출수사이상류적시공변화신식。단시，현사농도변화SPH모형적국한재우“함사량”실질상환시시공평균특정；현사입자운동SPH모형적국한재우목전타지괄용우구해SPH입자총량교소적류동문제。
The present research of water-sand two-phase flow was described. The basic principles of SPH method were presented,and the feasibility of introducing SPH method into the simulation of sand-water motion was expounded. A systematic illustration of the development of SPH method was given,and the study on sand-water two-phase flow by SPH method was summarized. The results show that:a)The suspended load concentration model can be developed based on the discrete convection-diffusion equation of suspended load,and the suspended load concentration SPH model can be established,by which the concentration variation of non-uniform suspended load can be calculated from small scale to large scale,and the temporal information of the“suspended load concentration particle”can be extracted;b)Based on particle dynamics,the suspended load particle SPH model can be developed,which can be used to simulate the sand particle’s motion in a small scale,and provide the temporal information of water-sand two phase flow. The limitation of suspended load particle model is that the concentration is still a temporal average feature,and the sus-pended load particle model can only be used when there are a few SPH particles.