To analyze the effects of non-Newtonian lubricants and surface roughness in journal bearing lubrication, a modified Reynolds equation is derived.
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The modified Reynolds equation is numerically calculated using super over relaxation method.
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Based on the variational constraint approach, the variational form of Reynolds equation in hydrodynamic lubrication is revised continuously to satisfy certain constraints in the cavitation zone of oil film field.
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According to the physical characteristic of oil film, an eight-node isoparametric finite element method is used to convert the revised variational form of Reynolds equation to a discrete form of finite dimensional algebraic variational equation.
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Turbulent Taylor vortex flow, which is contained between a rotating inner cylinder and a coaxial fixed outer cylinder with fixed ends, is simulated by applying the development in Reynolds stress equations mold (RSM) of the micro-perturbation.
Due to the gradual energy decay the free turbulent shear flow far downstream resembles the final stage motion of homogeneous isotropic turbulence. As in the latter case we adopt the concept of vortex motion structure of turbulence to solve the present problem. The dynamical basis of vortex motion solution is the set of equations of turbulent velocity fluctuation. In the flow field of the final stage motion of free turbulence the Reynolds number of turbulence is comparatively small, hence the non-linea...
In this paper, a method of calculation of heat-transfer rate for blunt-bodies in the case of hypersonic turbulent boundary-layer is presented. In order to transform the compressible and axisymmetrical turbulent boundary-layer flow to an incompressible and two-dimensional turbulent boundary-layer flow, the Mager - - Mangier transformation has been applied. According to the characteristics of hypersonic, turbulent boundary-layer with favourable pressure gradient, the classical single-parameter representation ...
The present paper is a further development, after the Great Proletarian Cultural Revolution, of our point of view that the element of homogeneous isotropic turbulence is a small axially symmetrical vortex. After long years of observation and analysis, we recognize that the structure of vortices, as elements of turbulence, does not obey the simple law of similarity or self--preservation. The structure undergoes a kind of stretching phenomena in the process of the decay of vortices. Therefore, we first bri...