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This article presents the applicability of the microcontinuum theories to the fluid in sliding surfaces. The classical continuum mechanics fails to predict the accurate results when the geometric volume under consideration becomes comparable to the material dimensions. The fluid in the presence of microstructures and in the space comparable to the clearance of bearings showed unexpected variations in its properties as per the experimental observations. A general class of micropolar fluid was defined by considering the microrotation vector of its particles. This review critically analyzes the microrotation of lubricant additives and its effects on static and dynamic characteristics of the bearings.

The viscous dissipation of micropolar lubricant results in temperature increase of hole-entry hybrid journal bearing. Thermohydrostatic (THS) performance characteristics are computed by the concurrent solution of micropolar Reynolds, micropolar energy, and conduction equations. The results obtained numerically indicate that bearing is significantly affected by increase in temperature. Hence, it is essential to consider the thermal effects for bearing operating with micropolar lubricant to produce realistic bearing characteristic data.

In this research paper, a simulation study has been carried out for the determination of convective heat transfer coefficients of papad under open sun drying and indoor forced convection drying modes. Experimental data obtained from open sun and indoor forced convection drying modes for papad were used to determine the values of the constants (C and n) in Nusselt number expression by using linear regression analysis, and consequently convective heat transfer coefficients were evaluated. The average values of convective heat transfer coefficients were found to be 3.54 and 1.56 W/m2 oC under open sun drying and indoor forced convection drying modes respectively. The experimental errors in terms of percent uncertainty were also evaluated.

This research article deals with numerical study of micropolar lubrication in constant flow valve compensated hole entry hybrid journal bearing by considering the thermal effects. The bearing performance characteristics are computed by the solution of modified Reynolds, three-dimensional energy, and three-dimensional conduction equations. The results obtained numerically indicate that bearing performance is significantly affected by increase in temperature. Hence it is imperative to consider the thermal effects for bearing operating with micropolar lubrication to generate realistic bearing characteristic data.