Circular Loop and Infinite Cylinder

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

I am trying to simulate an infinite PEC cylinder inside a  circular loop. For the infinite cylinder i used Periodic Boundary Condition.

In case 1 i have a cylinder with height h1 and PBC,

In case 2 i have a cylinder with height height h2  and PBC,

The strange is that the results are different. How is this possible?

'In both cases the cylinders have infinite height'. Am i correct?

Any suggestions?

Thanks in advance

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Answers

  • Johan_Huysamen
    Johan_Huysamen
    Altair Employee
    edited January 2019

    Hi Theodoros

     

    You mention that you have an infinite cylinder inside a circular loop. If this is modeled with the PBC in Feko it should be noted that the loops will also be repeated by the PBC. Your two models would then be different as one includes a loop repeated every h1 and the other has a loop repeated every h2 along the length of the infinite cylinder.

     

    Unless your initial model does not include the loop(s) - only having the cylinder? In that case you might see small differences due to different meshes being used.

     

    If the above does not clarify the issue, please share your model if possible.

     

    Kind regards,

    Johan H

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2019
    Altair Forum User said:

    Hi Theodoros

     

    You mention that you have an infinite cylinder inside a circular loop. If this is modeled with the PBC in Feko it should be noted that the loops will also be repeated by the PBC. Your two models would then be different as one includes a loop repeated every h1 and the other has a loop repeated every h2 along the length of the infinite cylinder.

     

    Unless your initial model does not include the loop(s) - only having the cylinder? In that case you might see small differences due to different meshes being used.

     

    If the above does not clarify the issue, please share your model if possible.

     

    Kind regards,

    Johan H

    Dear Johan

    Thanks for your reply.

    Yes i have a an infinite cylinder inside a loop.

    You are right with PBC besides the cylinder, the loop is repeated. (i dont want it)

    I want only the cylinder
    Do you have any proposal how to solve this type of problem

    Thanks

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