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# BELA electrostatic force calc

- To: femm@yahoogroups.com
- Subject: BELA electrostatic force calc
- From: "iaaeinc" <iaaeinc@yahoo.com>
- Date: Thu, 10 Apr 2003 17:45:45 -0000
- User-agent: eGroups-EW/0.82

    I have a question about the BELA electrostatic force calculation of
    the conductor dielectric analysis. If you want to get the effective
    pressure/force due to the surface charge in the electrostastic field,
    isn't that should be computed from the Maxwell stress equation
    integrated on the conductor surface only ? The manual says you should
    do the line integral away from the surface (If you do so, the there
    is no charge in the outer dielectric media ?). Also, the equation
    does not seems to be correct

    df = 0.5(D(H*n)+H(D*n)-(D*E)n))

    Shouldn't that be the integral of Tij*n on the conductor surface
    (line integral)? Tij is the Maxwell stress tensor from the D,E,H,B.

    thanks

    ted

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