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Masato Kaneko2022 Volume 36 Issue 2 Pages 68-82
Published: 2022
Released on J-STAGE: July 29, 2022
JOURNAL FREE ACCESSIn this study, I investigated the relationship between the high pressure density of lubricant and pressure and temperature. As a result, the van der Waals type liquid density equation was derived consisting of three material-specific constants: absolute zero density ρt=0[g/cm3], density constant 1/E[(g/cm3)GPa/K] and pressure constant F/E[GPa]. It was found that the absolute zero density ρt=0 and the pressure constant F/E in the liquid density equation are equivalent to the inverse of the absolute zero specific volume Vt=0 [cm3/g] and the corrected pressure PR for pressure drop due to the intermolecular force in the van der Waals type liquid state equation. This equation also agrees with the ideal liquid model density equation. This made it possible to estimate the high pressure density of lubricant.
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