electro-hydrodynamics方程的弱L^p Prodi-Serrin型正则准则(英)

主要研究了electro-hydrodynamics方程弱解的正则准则.证明了在条件u∈L^s(0,T;L^(r,∞)(Ω))或‖u‖L^(s,∞)(0,T;L^(r,∞)(Ω))≤C(其中(3/r)+(2/s)=1且r∈(3,∞],C=C(r,Ω)>0)下,弱解在区间[0,T]上也为强解.

Electro-Hydrodynamic(EHD) Thrust Analysis in Wire-Cylinder Electrode Arrangement

The thrust generation by electro-hydrodynamic （EHD） effect has been studied for a wire-cylinder arrangement under high DC voltage. Series of measurements have been conducted in order to determine the relationship between generated thrust and corona discharge current, as well as its dependence on geometrical characteristics of the electrodes, e.g. electrode gap, wire and cylinder radii. The experimental investigation has shown a linear relationship between the generated thrust and the discharge current, while parametric analysis showed that increased electrode gap and emitter radius reduces the thrust. On the other hand, large gaps favor the thrust per unit power ratio.

AN EXPERIMENTAL STUDY ON THE FLOW FIELDS OF THE WEST LAKE BY ELECTRO-HYDRODYNAMIC ANALOGUE METHOD

Electro hydrodynamic analogue (EHA) method is applied to study the flow fields in the West Lake. It gives out a satisfactory result on water velocities and discharges of the bridge openings.

Separating polydisperse particles using electrostatic precipitators with wire and spiked-wire discharge electrode design

Numerical simulations of electrostatic precipitators featuring wire and spiked electrode designs were performed to determine particle behavior and separation efficiency. The applied-voltage mechanism that alters the flow structure of particles through ionic winds and mean electric fields are revealed. Numeri- cal studies throughout the past years have shown these structures for channel and pipe configurations. However, less attention was given to field averaging for the ni,~r-product and electric field. Our study focuses on this averaging and illustrates relevant differences between multidimensional setups concern- ~ng these fields. Turbulence was modeled using the Reynolds-averaged Navier-Stokes equations with a second-order Reynolds-stress-model closure. A high three-dimensionality of the ionic wind-induced turbulence is presented. This leads to an increase in the submicron-particle precipitation rate. The results confirm the dependence of separation efficiency on particle density and permittivity, thereby showing the advantages of spiked wires compared with wire-plate setups used in electrostatic precipitators.

Fabrication of micro/nano-structures by electrohydrodynamic jet technique

Electrohydrodynamicjet （E-Jet） is an approach to the fabrication of micro/nano-structures by the use of electrical forces. In this process, the liquid is subjected to electrical and mechanical forces to form a liquid jet, which is further disintegrated into droplets. The major advantage of the E-Jet technique is that the sizes of the jet formed can be at the nanoscale far smaller than the nozzle size, which can realize high printing resolution with less risk of nozzle blockage. The E-Jet technique, which mainly includes E-Jet deposition and E-Jet printing, has a wide range of applications in the fabrication ofmicro/nano-structures for micro/nano-electromechanical system devices. This tech- nique is also considered a micro/nano-fabrication method with a great potential for commercial use. This study mainly reviews the E-Jet deposition/printing fundamentals, fabrication process, and applications.

Global Regularity for a 2D Model of Electro-Kinetic Fluid in a Bounded Domain

In this paper, we consider an initial boundary value problem for a 2D model of electro-kinetic fluid in a smooth and bounded domain. We prove that the model has a unique global-in-time smooth solution.