A Theoretical Investigation on the Capillary Model of Lubricant Penetration
In metal processing, lubricant penetration process can be explained by the capillary model theory. Observed through microscope, cylindrical capillary model was chosen and was analyzed on the basis of hydrokinetics. Moreover, it was indicated of the basis for dividing the entire penetration process. Based on kinetic theory of gases, the penetration of gas-liquid two-phase flow in minimum quantity lubrication (MQL) machining was simply analyzed and it was pointed out that there was only gaseous phase filling process.
W. J. Zheng et al., "A Theoretical Investigation on the Capillary Model of Lubricant Penetration", Advanced Materials Research, Vols. 383-390, pp. 3871-3875, 2012