Voidage Wave Instability in a Vibrated Liquid-Fluidized Bed
نویسندگان
چکیده
منابع مشابه
Bed Voidage and Heat Transfer in Non-Newtonian Liquid-Solid Fluidized Bed
The presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. Moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. The aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coeff...
متن کاملMagnetically assisted liquid–solid fluidization in normal and microgravity conditions: experiment and theory
The application of an external magnetic field on a fluidized bed of ferromagnetic particles is well known in a conventional two-phase, gas–solid or liquid–solid fluidization. The external magnetic field significantly changes the fluidized bed fluid-dynamic behavior and if creatively used may enhance the bed performance. In this paper, a theoretical fluid-dynamic model describing behavior of a G...
متن کاملHeat Transfer of Liquid/ Solid Fluidized Beds for Newtonian and Non-Newtonian Fluids
The excellent performance of fluidized bed heat exchangers is due to the interaction between particles and heat transfer surface and to the mixing effects in the viscous sublayer. In this paper, the results of experimental investigations on heat transfer for a wide range of Newtonian and non-Newtonian (shear-thinning power law) fluids are presented. New design equations have been developed ...
متن کاملThe Effect of Vibration on Bed Voidage Behaviors in Fluidized Beds with Large Particles
The effects of vibration parameters, operating conditions and material properties on bed voidage were investigated using an optical fiber probe approach in a vibrating fluidized bed with a diameter of 148 mm. Variables studied included frequency (0-282 s), amplitude (0 mm-1 mm), bed height (0.1 m-0.4 m) as well as four kinds of particles (belonging to Geldart's B and D groups). The axial and ra...
متن کاملA generalized correlation for equilibrium of forces in liquid–solid fluidized beds
Following a critical publication review on the expansion of fluidized bed with the fluid velocity, the well-known Richardson–Zaki equation is applied to develop a more accurate relationship linking the apparent drag force Fd, the effective gravitational force Fg and the voidage of fluidized beds under intermediate regime. A correcting constant a in the relationship is a function of Archimedes n...
متن کامل