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مکانیک::
ضریب برگشت
Although in some granular flows the restitution coefficient is restrained to values close to unity, its deviation from unity results in a significant variation in the properties of granular flow.
(1984) developed a theory that predicts the simple shear flow behavior for a wide range of the restitution coefficient.
where dp is the diameter of particle, e is the restitution coefficient, and g0 is the radial distribution function.
The dissipation of solids turbulent kinetic energy by collisions with the wall is specified by the particle-wall restitution coefficient, esw.
It is expected that the specularity coefficient and the particle-wall restitution coefficient need to be calibrated for a given gas/particle flow system because the specularity coefficient cannot be measured and esw can be measured only with some difficulty (Benyahia et al. 2005).
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