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Importance of element normals

  1. Jul 12, 2013 #1
    Hi
    what is the importance of element normals in a FE mesh ?
    How does it matter if it is outward or inward in a FE solver ?
    I came across Visual Crash Pam software in which negative element ids would mean element normals in opposite direction. how would this affect the overall result of an analysis?

    Thanks
     
  2. jcsd
  3. Jul 13, 2013 #2
    What kind of analysis you are doing??

    If you are analysing heat transfer problem, element normals are useful in defining the optical properties like emissivity
     
  4. Jul 13, 2013 #3
    it is a coupled analysis involving structural (explicit and implicit) and thermal analysis (implicit)
     
  5. Jul 16, 2013 #4
    If it is a thermal analysis & if you are considering radiation also, then element normals help you in defining optical properties.
     
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