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By スリーエーネットワーク

ISBN-10: 4883191605

ISBN-13: 9784883191604

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The type of electroconvection present depends on a number of factors, the most important of these being the medium present and injection method. For liquids, the Coulomb force induces velocities very much greater than those created by ionic drift, whereas the opposite relation is found in gases [32]. 4. 3 Instability Fundamental studies into the onset of electroconvection in insulating liquid have been carried out by Watson et al. [33]. The apparatus used can be seen in Fig. 4, they used an electron beam to charge the free surface of a silicone fluid film.

A discussion of the energy equation is also made here to show how charge also affects this. Relevant timescales and nondimensional numbers associated with the EHD system have been defined, in particular a brief introduction is provided concerning the T, C and M parameters widely quoted in the available literature. The final sub-sections discuss the underlying physics associated with EHD flow including the initiation of the charged convective plumes and transitionary regime to turbulence before discussing the fully random chaotic events observed after this.

3). It can be seen in Fig. 5 that a larger tip radius reduces the current injected into the dielectric for the same applied voltage. Similar plots for a blade-plane arrangement can be seen in Figs. 8. A current-voltage law for the space-charge limited conduction regime is deduced to have the form V-V0 = k’I1/3, where k’ is a constant. 44 3 Charge Injection into a Quiescent Dielectric Liquid 16 14 B C A V (kV) 12 V0 V0 V0 10 8 6 4 2 0 0 1 2 1/2 × I -4 10 (A 3 1/2 4 ) Fig. 6 Plots of V vs I1/2 from figure 17.

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みんなの日本語初級1 教え方の手引き Japanese for Everyone Japanese by スリーエーネットワーク


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