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By Sun Keping and Yu Gefei (Eds.)

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Additional resources for Recent Developments in Applied Electrostatics. Proceedings of the Fifth International Conference on Applied Electrostatics November 2~5, 2004, Shanghai, China

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At the beginning, the flow velocity is small, and the air movement is concentrated in a very small area near the tip. The air is accelerated by the Coulomb force 31 and quickly spreads out both in axial and radial directions; the maximum velocity increases and so does the maximum mass flow, what can be seen from Figures 2(b) and 3(b). After several milliseconds (Figures 2(c) and 3(c)) the airflow almost reaches the steady state in which the axial velocity dominates along the axis of the symmetry and the radial one along the plate as shown in Figures 2(d) and 3(d).

Such a phenomenon is of practical importance in designing of EHD pumps [3]. Many authors have attempted to simulate this process. One-dimensional model of the charge transport in a stationary layer of liquid was investigated in [4]. Current oscillations in one-dimensional plane, cylindrical or spherical configurations were also studied [5]. Pontiga and Castellanos correlated the V-I characteristics with two parameters defining the model: the ohmic conductivity and the ratio of the emitted and bulk ion densities [6].

4 The induced current at the cable, double-end grounding, vertical mode,+5kV Fig6 The induced current at the cable, double-end grounding, parallel mode,+5kV 47 EXPERIMENTAL RESULTS ANALYSIS The grounding model- induced current As shown in figures 3 and 4 peak value of the induced current when the communication cable is singleend grounding is much larger than that of double-end grounding. 6 Similarly, the result is consistent with the above overcom. To study this phenomenon, the loop area between the cable shielding layer and the earth is reduced when the cable is double-end grounding, and the induced current is also decrease.

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