The pressure and temperature dependence of volume and viscosity of four Diesel fuels

摘要: Abstract The relative volumes and the viscosities of four Diesel fuels have been measured experimentally to pressures up 350 MPa temperatures 160 °C. experimental liquids were an extra low viscosity reference fuel, ethanol based blend, neat biodiesel 20% biodiesel. Tait Murnaghan equations state represented pressure–volume–temperature response equally well. improved Yasutomi model for supercooling liquids, which accurately represents temperature pressure dependence lubricating oils, did not fit data well except Surprisingly, Doolittle free-volume equation was accurate only fuel. reason correlation difficulties may be illuminated by behavior thermodynamic scaling viscosities. Stickel analysis normalized Ashurst–Hoover parameter indicates that, all lie across transition in pressure. Consequently, comprehensive successfully fits data.