How should I choose the minimum length of wedges for standard ray tracing?

JM_21554
JM_21554 New Altair Community Member
edited March 5 in Community Q&A

Hello, 


I wanted to ask what exactly the minimum length of wedges under "Handling of diffractions" in ProMan is all about. 


1. which effects does this value have?
2. is there a minimum and maximum limit for the selection of the value that must not be exceeded?
3. how does the choice of the value depend on the object sizes and the frequency in my project (I want to do some simulations at 77 GHz with a wire mesh fence. This has a mesh width of approx. 5 cm. Do I have to take this into account when choosing the wedge length?)

Many thanks for your help in advance!

Tagged:

Answers

  • reinerh
    reinerh
    Altair Employee
    edited February 29

    Hello,

    wedges smaller than the defined value for "minimum length of wedges" will be discarded for the propagation analysis i.e. neglected.
    The default value of 0.01m should be also fine for 77 GHz as just a few wavelengths.

  • JM_21554
    JM_21554 New Altair Community Member
    edited March 4

    Hallo Reiner,

    vielen Dank, das hilft mir schon einmal viel weiter!

     

    Ich verstehe nur nicht ganz, wie man sich die Wedges an einem Objekt vorstellen kann. Ich habe im WinProp User Guide die angehängte Abbildung gefunden, unter der das Ray-Tracing erläutert wird. Wie kann man hier die Wedges annehmen?

     

    Vielen Dank und beste Grüße!

    Julian

     

     

     

     

  • reinerh
    reinerh
    Altair Employee
    edited March 5
    JM_21554 said:

    Hallo Reiner,

    vielen Dank, das hilft mir schon einmal viel weiter!

     

    Ich verstehe nur nicht ganz, wie man sich die Wedges an einem Objekt vorstellen kann. Ich habe im WinProp User Guide die angehängte Abbildung gefunden, unter der das Ray-Tracing erläutert wird. Wie kann man hier die Wedges annehmen?

     

    Vielen Dank und beste Grüße!

    Julian

     

     

     

     

    Hi Julian,
    let us better switch to English, so others can also profit from the exchange.

    The wedges are typically given at neighbouring polygons e.g. in case of a building when two walls come together there is a vertical wedge or between vertical wall and horizontal roof there is a horizontal wedge.
    For more complex objects like a car there are many more wedges at the curved structure, but always and the boundary of neighboring elements (polygons).

    Best regards,

    Reiner Hoppe

Categories