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Full-Text Articles in Mechanical Engineering
Deposition Of Suspensions In Convergent Channels Due To Electrostatic Image Forces, Kwok Wah Hui
Deposition Of Suspensions In Convergent Channels Due To Electrostatic Image Forces, Kwok Wah Hui
Dissertations
The deposition of suspensions for uniform flow in convergent channels under the combined influences of inertia, viscous and electrostatic image forces was studied theorectically. The fluid phase was assumed to be two-dimensional, steady, uniform, incompressible and laminar while the particle phase was assumed to be uniform, steady, dilute and with negligible gravity effects.
Since the image force equations for convergent channels have not been derived, it becomes one of the main purposes of this study to perform the derivation of the image force equations. The lengths of the channels were chosen in a way that the exit area is only …
Deposition Of Particles In Tubes Due To Gravity And Electrostatic Charges, Win-Chung Chen
Deposition Of Particles In Tubes Due To Gravity And Electrostatic Charges, Win-Chung Chen
Dissertations
The deposition of particles in a parallel-plate channel and a circular tube under the influence of inertia, fluid viscosity, gravity and electrostatic image forces was studied by analytical and numerical methods. A laminar flow with uniform and parabolic velocity profiles was investigated with a particle initial velocity of zero as well as that of the local fluid velocity.
The governing equations were solved by the Lagrangian approach to obtain the particle trajectories from which the fraction of deposition was calculated. Closed form solutions for particle trajectory and a complete deposition of particles in a finite length of the flow passage …