الخلاصة

In this paper , theoretical analysis of effective particle of long chain polymer on performance improvement of human joint is presented . mathematical model depended on laminar steady flow of synovial fluid that it contains on hyaluronic acid between articular cartilage in( hip- knee –ankle) joint , where Reynolds equation governing the fluid film pressure was derived and solved analytical . Quasi-statics equilibrium equation determined friction force during daily active ,the influence of film thickness and squeeze action , length of chain and speed on the squeeze film characteristics was discussed .It has been found that the effect of decreased film thickness of particle leads to increase the load carry capacity ,friction force and decreased flow rate .It is observed that the effect of length of particle on pressure film between articular surface with sliding motion is to increased