MATHEMATICAL SIMULATION OF THE SWIRLING FLOW OF A DILATANT HERSCHEL–BULKLEY FLUID IN A CYLINDRICAL CHANNEL

Results of an investigation of the swirling fl ow of a dilatant Herschel–Bulkley fl uid with a yield point in a cylindrical channel are presented. It was established that the effective viscosity of such a fl uid at the input cross section of a cylindrical channel increases with increase in the intensity of its vortex, which can cause plugging of the channel. As the Rossby number of this fl uid increases, its effective viscosity in the region of unstable fl ow at the axis of the channel decreases, and the opposite effect takes place in the near-wall zone of the channel. As the fl uid fl ow stabilizes downstream, the effective viscosity of the fl uid in the near-wall region of the channel decreases, and the effective viscosity of the fl uid near the channel axis increases, which leads to the formation of a quasi-solid fl uid fl ow
   
Author:  O. V. Matvienko, V. P. Bazuev, and A. E. Aseeva
Keywords:  rheology, dilatant fl uid, viscoplastic fl uid, Herschel–Bulkley fl uid, swirling fl ow, computational hydrodynamics
Page:  1593