Voidage waves in hydraulic conveying through narrow pipes
作者： Eldin Wee Chuan Lim
DOI: 10.1016/J.CES.2007.05.034
关键词: Pressure drop 、 Discrete element method 、 Sedimentation (water treatment) 、 Wavelength 、 Granular material 、 Mechanics 、 Mineralogy 、 Materials science 、 Phase diagram 、 Settling 、 Phase (matter)
摘要: Abstract The nature of voidage waves in hydraulic conveying systems has been investigated computationally this study. Voidage consisting alternating regions high and low solid fractions were observed to form spontaneously through vertical pipes. wavelengths these found be inversely related mean fraction but independent liquid velocities for elastic particles. wave structure terms the thickness shape profile over each dense phase was dependent on used. Pressure distributions along longitudinal direction pipe exhibited an interesting ‘step’ due unequal pressure drops across dilute regions. With inelastic particles, a lower tendency formation diagram constructed show combinations operating conditions under which would form. Finally, study extended case horizontal channels. In addition various system parameters, also affected by gravitational settling
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