ON THE IMPORTANT MEANING OF BIO-LIQUID DYNAMIC VISCOSITY VARIATIONS IN THE LUBRICATION FLOWS

The main topic of this paper refers to the numerous relations between the decrements of the dynamic viscosity of non-Newtonian bio-liquid lubricated human joints on the one hand and, on the other hand, with consequences resulting from various diseases such as low fitness and low skills of human limbs, joint unfitness, large wear of cooperating cartilage bio-surfaces. Additionally, this paper indicates the pharmacology methods performed in vivo to enhance the bio-liquid lubricant dynamic viscosity. After numerous experimental measurements, it directly follows that the collagen fibre, hyaluronate acid particle, power hydrogen ion concentration pH in lubricating bio-liquid and absorbability features of lubricated bio-surface have a direct and indirect significant influence on the bio-liquid dynamic viscosity values variations with interfacial energy distribution across the film thickness. The results presented in this paper are confirmed based on experimental measurements and analytical, numerical solutions of the load-carrying capacity, friction coefficient and bio-liquid dynamic variations performed for various human joints. These effects were simply disregarded in previous studies. The aforementioned problem has not been considered in contemporary research literature in the medical tribology domain to the Author's best knowledge. The results obtained should enable one to introduce more effective and accurate therapeutic protocols into the human joint treatment regimen. The results obtained have applications on a wide scale in spatiotemporal models in bio-tribology, biology and health science.