JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS
Online ISSN : 2189-9967
Print ISSN : 0915-1168
ISSN-L : 0915-1168
Volume 62 , Issue 10
Special Issue on Tribology of Instruments
Showing 1-13 articles out of 13 articles from the selected issue
Announcement
Contents
Serial Messages to Tribologists
Special Issue on Tribology of Instruments
Explanation
Report
The Report of Research Group on Lubricating Grease (Part.19)
The Report of Research Group on Lubricating Grease (Part.20)
Original Contribution on Science
  • ―Deriving Equation of Relations of Pressure, Temperature, Density and the Viscosity―
    Masato KANEKO
    2017 Volume 62 Issue 10 Pages 654-666
    Published: October 15, 2017
    Released: October 15, 2017
    [Advance publication] Released: August 30, 2017
    JOURNALS FREE ACCESS
    The relation with viscosity and pressure of lubricant has been considered in detail from the past. Barus equation that was presented in 1893 is known as the basic equation. This paper describes the new linear viscosity equation, that included dimensionless density and temperature other than pressure as functions in comparison with Barus equation. Author measured high pressure viscosity by using reciprocating-piston type test apparatus and measured high pressure density by using capacity type test apparatus in each temperature and pressure. After that, author attempted to derive the density into Barus equation and it was found that dimensionless density was preferable as density. Furthermore, author attempted to introduce temperature into Barus equation. It became able to in this way deal with the new viscosity equation as a linear equation. It found out that the logarithm of dimensionless viscosity was proportional to pressure and it was inversely proportional to temperature and dimensionless density cubed. And it was found that these slope δ of lubricants by this linear equation are intrinsic constant.
    Download PDF (5103K)
Report of the Society
feedback
Top