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Micro fluidized bed is a promising reactor for a variety of industrial processes. It is important to understand the hydrodynamics of gas-solid fluidization of the micro fluidized beds with different oblique angles. This study numerically investigated the effects of oblique angle on the fluidization behavior and pressure drop in the micro fluidized beds by Computational Particle-Fluid Dynamics (CPFD)...
A size-dependent model of a micro-electromechanical system (MEMS) actuated by both electrostatic and piezoelectric forces is proposed based on the modified couple stress theory. The governing equation and boundary conditions are derived with the help of the Hamilton principle and solved numerically by employing the Galerkin method and Newton downhill method. A material length scale parameter (MLSP)...
With piezoelectric layers attached, the electrostatically actuated microbeam-based MEMS (Micro-Electro-Mechanical Systems) is modelled to study the pull-in instability based on a modified couple stress theory. The nonlinear differential governing equation and boundary conditions of the beam are derived by using Hamilton's principle. The results show that the piezoelectric layers can decrease the pull-in...
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