عنوان المقالة:تأثير النفاذية على تزييت غشاء الضغط بسائل الضغط الزوجي في مفصل الورك الزليلي البشري The Effect of Permeability on the Squeeze Film Lubrication with a Couple Stress Fluid in Human Synovial Hip Joint
Abstract – On the basis of the Stokes micro continuum fluid theory ,a theoretical analysis of effect of permeability and couple stress on squeeze film characteristics in human synovial hip joint is presented .To take into account the couple stress effects due to the lubri- cant containing additives or suspended particles ,the modified Reynold,s equation governing the fluid film pressure was de- rived.The modified Reynold,s equationis is solved analytically, and closed form expressions for the squeeze film pressure, and load carry capacity were presented. The influence couple stresses and permeability on the squeeze film characteristics were discussed. It has been found that the effect of couple stresses increased the pressure distribution , load carry capacity and squeeze film time, and decreased the friction coefficient, as compared to the Newtonian lubricant case . The effect of permeability on the healthy hip joint was found to increase the pressure distribution , ,load carry capacity , squeeze film time and decreased the coefficient of friction as compared to diseased
ايناس يحيى عبدالله | enas yahya abdullah | 6983