How can I set inlet interior(or surface) as "absorbing"

Altair Forum User

Hello,

 

I am practicing RCS calculation and took the FEKO webinar recording presented by Martin Vogel. (Link : http://web2.altairhyperworks.com/feko-webinar-rcs)

 

In the webinar, 3 step process was introduced to reduce computational cost, and inlet interior was set 'absorbing' (Time 24:45)

However, I could not find the detailed way to set absorbing surface  when I tried to repeat the process with simple rectangular closed cavity.

 

I had internal surfaces set as waveguide port without source to make termination and it worked with MoM solution when just single internal surface was set to waveguide port. But it didn't work when multiple surfaces was set to waveguide port (Error occured and the program could not proceed the calculation)

So, how can I find absorbing setting at surface?

I would really appreciate if someone can solve this problem.

 

 

JIF

Hello mirmir0611,

 

So, how can I find absorbing setting at surface?

The model in the webinar uses RL-GO and when setting a face to be modeled using RL-GO, there are options to set the face absorption properties. See the screenshot below:

 

In order to know what side should be absorbing, you can colour by normal (on the Display options tab). In the case of the webinar, both sides could be set to not consider transmission / reflection.