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# Neumann boundary condition

- To: femm@yahoogroups.com
- Subject: Neumann boundary condition
- From: "Si hang" <sh9988@mail.hz.zj.cn>
- Date: Wed, 14 Nov 2001 08:39:47 -0000
- User-agent: eGroups-EW/0.82

    Dear David and All,

    I have encountered a mixed boundary condition (see below) along the
    outer boundary of domain in a 2D time harmonic simulation.

    Ht = Jm * exp(-jPhi * x)

    Where Jm is the line density of Current, Phi is the phase angle
    and it is a function of x-coordinate.

    This condition can't be set directly to the boundary with the Mixed
    boundary condition in FEMM. The only way I have thought is to split
    the boundary into many small segments. Then manually calculate the
    values on each segment's midpoint, set each segment's condition with
    its midpoint's value.

    Apparently, it's not a good way and cause a lot of work. Is there a
    better way or we can add the feature that support Mixed boundary
    condition with a function of coordinates(like the Prescribed A
    condition)?

    Best regards

    Si hang

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