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A theoretical study of combined effects of non-Newtonian rheology and viscosity-pressure dependence in the sphere-plate squeeze-film system by Rong-Fang Lu; Jaw-Ren Lin is a Engineering article available to read on EtoBox.
What is A theoretical study of combined effects of non-Newtonian rheology and viscosity-pressure dependence in the sphere-plate squeeze-film system about?
A theoretical study of the combined effects of non-Newtonian couple-stress lubricants and variation of viscosity with pressure in the squeeze-film motion between a sphere and a flat plate is presented. To account for the couple stress effect arising from a lubricant blended with various additives and to consider the viscosity-pressure dependence, the nonlinear non-Newtonian Reynolds-type equation is derived in accordance with the Stokes microcontinuum constitutive equations cooperated with the Barus formula. Through a small perturbation technique, the analytical approximate solution for the film pressure is obtained. According to the results, the combined effects of couple stresses produced by the spin of microelements and viscosity-pressure dependence provide an enhancement in the loadcarrying capacity and lengthen the response time as compared to the classical iso-viscous Newtonian-lubricant case. On the whole, the sphere-plate squeeze-film characteristics are improved, especially for higher values of couple stress parameter and viscosity parameter. An application to a lubrication problem is also illustrated for to assess the extent to design the sphere-plate squeeze-film system
Who reads A theoretical study of combined effects of non-Newtonian rheology and viscosity-pressure dependence in the sphere-plate squeeze-film system?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Rong-Fang Lu; Jaw-Ren Lin
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0301-679X)
- Published
- 2007
- Language
- EN
- Field
- Engineering (Physical Sciences)