An attempt is made to analyse some lubrication characteristics of rigid cylindrical asymmetric rollers under adiabatic and isothermal boundaries with rolling and sliding motion lubricated by a non-Newtonian incompress...An attempt is made to analyse some lubrication characteristics of rigid cylindrical asymmetric rollers under adiabatic and isothermal boundaries with rolling and sliding motion lubricated by a non-Newtonian incompressible Bingham plastic fluid under the behaviour of line contact.Here the lower surface is considered to move quicker than that of the upper surface;and the Roelands viscosity model is considered and assumed to depend upon the fluid pressure and the mean film temperature.The governing equations for fluid flow such as equations of motion with continuity and the momentum energy equation are solved using Runge-Kutta forth order and MATLAB is employed to solve these equations.Through graphs and tables for Newtonian and non-Newtonian fluids,the several crucial bearing characteristics including velocity,pressure,viscosity,mean temperature,load and traction are examined and a significant change is observed among them.The findings presented here are qualitatively consistent with the existing literature.展开更多
The transient vistosity response of a lubricant following the pressure charge in a EHDcontact is consideied in the line-contact isothermal elastohydrodynamic lubrication analyses. Soobtained pressure distribution and ...The transient vistosity response of a lubricant following the pressure charge in a EHDcontact is consideied in the line-contact isothermal elastohydrodynamic lubrication analyses. Soobtained pressure distribution and the oil film thickness are different from those obtained with equi-librium viscosity.展开更多
The data measured by using the two-disc tester show that the concentration of EP addi- tives and the viscosity temperature characteristic of lubricant have a cooperation effect on the fric- tion coefficient in boundar...The data measured by using the two-disc tester show that the concentration of EP addi- tives and the viscosity temperature characteristic of lubricant have a cooperation effect on the fric- tion coefficient in boundary lubrication.展开更多
文摘An attempt is made to analyse some lubrication characteristics of rigid cylindrical asymmetric rollers under adiabatic and isothermal boundaries with rolling and sliding motion lubricated by a non-Newtonian incompressible Bingham plastic fluid under the behaviour of line contact.Here the lower surface is considered to move quicker than that of the upper surface;and the Roelands viscosity model is considered and assumed to depend upon the fluid pressure and the mean film temperature.The governing equations for fluid flow such as equations of motion with continuity and the momentum energy equation are solved using Runge-Kutta forth order and MATLAB is employed to solve these equations.Through graphs and tables for Newtonian and non-Newtonian fluids,the several crucial bearing characteristics including velocity,pressure,viscosity,mean temperature,load and traction are examined and a significant change is observed among them.The findings presented here are qualitatively consistent with the existing literature.
文摘The transient vistosity response of a lubricant following the pressure charge in a EHDcontact is consideied in the line-contact isothermal elastohydrodynamic lubrication analyses. Soobtained pressure distribution and the oil film thickness are different from those obtained with equi-librium viscosity.
文摘The data measured by using the two-disc tester show that the concentration of EP addi- tives and the viscosity temperature characteristic of lubricant have a cooperation effect on the fric- tion coefficient in boundary lubrication.
