[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# Re: Magnetic Field Source

- To: femm@yahoogroups.com
- Subject: Re: Magnetic Field Source
- From: "mvalca" <mvalca@yahoo.com>
- Date: Fri, 11 Apr 2003 06:57:34 -0000
- In-reply-to: <b74oam+rn5f@eGroups.com>
- User-agent: eGroups-EW/0.82

    Hello Ron,
    the vector potential is always "out of page", so for the planar
    problem is perpendicular to the XY plane and for axisymmetric
    problems to the RZ plane

    Marco

    --- In femm@yahoogroups.com, "tano1938" <rgarritano@c...> wrote:
    > Thanks for the explanation. I think I'm starting to understand
    it.
    > Is it true then that A is always applied in the C3 direction when
    > working with planar problems so that the flux is in the XY plane?
    > For some reason, I thought it was directed up, in the Y direction.
    > For axisymmetric problems, what is the direction of A?
    >
    > Ron
    >
    >
    > --- In femm@yahoogroups.com, "David Meeker" <dmeeker@i...> wrote:
    > > --- In femm@yahoogroups.com, "tano1938" <rgarritano@c...> wrote:
    > > > I'm a first time user of femm. I've been working through the
    > > > tutorial and am confused by the units and significance of
    > > > the "Magnetic Field Source", i.e. Weber/meter. How does it
    > relate to
    > > > Magetic Intensity (H) or Flux Density (B). Since it is a user
    > input,
    > > > I'd like to know how to apply it to a practical situation.
    I've
    > > > never had to use it before, but I've never used an FEA program
    > before
    > > > also.
    > > >
    > > > Thanks for your help.
    > >
    > > In this example, the idea was to model a block sitting in a
    magnetic
    > > field that would be constant in the absence of the block. In this
    > > case, you can set the magnitude of the field, over a square
    domain,
    > by
    > > setting the potential at one edge of the domain to be zero, and
    the
    > > potential at the other edge of the domain to be (flux
    > > density)*(length) where (length) is the length of one of the
    sides
    > of
    > > the square.
    > >
    > > This is perhaps not the most typical sort of problem. In most
    > cases,
    > > the field is driven by coils or permanent magnets that are
    > explicitly
    > > modeled as part of the solution domain--most of the included
    example
    > > problems are like that. In those cases, you can define potential
    to
    > > be zero at some suitably far distance from the objects of
    interest
    > (or
    > > you can use one of the more subtle "open boundary" techniques
    > > discussed in the manual).
    > >
    > > Dave.

- References:
  - Re: Magnetic Field Source
    - From: "tano1938" <rgarritano@comcast.net>

- Prev by Date: Re: Magnetic Field Source
- Next by Date: zoomier
- Previous by thread: Re: Magnetic Field Source
- Next by thread: Finite Element Electrostatics Program
- Index(es):
  - Date
  - Thread