FDTD Material Specification

pmcardle
pmcardle Altair Community Member
edited October 2020 in Community Q&A

  Why is it not possible to use a frequency dependent dielectric material with the FDTD solver? 

 

Cheers,

Patrick

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2018

    Hi Patrick,

     

    Note that the FDTD formulation does support sigma losses for dielectric materials. The FDTD formulation to support tan delta is more complex, and also slows down the solver considerably - this is why it has not been implemented yet. If you feel that you need this in the FDTD solver can you please share a bit of detail about what applications you are interested in simulating?

  • pmcardle
    pmcardle Altair Community Member
    edited October 2018

      We are trying to simulate a perfectly conducting sphere over a rectangle which has a frequency dependent dielectric function. I also noticed that negative real permittivity is not supported by the FDTD, why is this?

     

    Cheers,

    Patrick

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2018

    Hi @pmcardle,

     

    Is there a reason why you want to use FDTD for this problem? Due to the limitations, it sounds more suitable to rather use MoM or FEM.

Categories