Elastohydrodynamic Lubrication Analysis on the Performance of Artificial Hip Joint for Sitting (Iftirasy) Movements in Muslim Prayer (Salat) Activity.
Jamari, Mohammad Tauviqirrahman, Havilla Rizieq Husein, and Muchammad

Department of Mechanical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia.

Abstract

The Patients of artificial hip joint are recommended to limit the extreme movements that could cause damage of the device, such as salat movement. As many study performed the simulation by neglecting the presence of synovial fluid, in this study we examined the performance of artificial hip joint under elastohydrodynamic boundary condition which close to realistic state. To investigated the effect of the existence of the lubricant in the artificial hip joint on the lubrication performance including the structure of artificial hip joint during sitting (^Iftirasy^) salat movement. Fluid-Structure Interaction (FSI) method employed to solve the mechanism of elastohydrodynamic lubrication in the artificial hip joint durining sitting (^Iftirasy^) in salat movements are of particular interest. The simulation results show that in order to obtain more accurate result, the lubricant of the synovial fluid should be considered and modeled, additionally, the existence of the lubricant is proven to prevent the solid contact as well as impingement between the component during sitting (^Iftirasy^) salat movement. In this study we investigated the lubrication and structural performance of artificial hip joint in salat activity to accommodate the major religious practice of Muslim community. The impact of this study are useful in continuing development of biotribology and biomedical aspect of the device.

Keywords: artificial hip joint- synovial fluid- elastohydrodynamic lubrication- computational fluid dynamic (CFD)- fluid-structure interaction (FSI)- Muslim prayer (salat).

Topic: Engineering