Specifying spawn angle of meta-particles (with hyperstudy)

Matthias Vink
Matthias Vink Altair Community Member
edited May 31 in Community Q&A

Dear all,

 

I am trying to test the stability of my meta particles based on the angle at which they impact the floor. EDEM offers a feature that lets me specify the spawn angles using a rotation matrix (defining this is very tedious itself, and I would much rather specify xyz angles instead of using an online rotation matrix calculator)

image

But, using the EDEM-Hyperstudy connector, I get the following under factory options:
image

The fact that four parameters contain orientation suggests they are not XYZ angles? How are these related to the orientation matrix in EDEM and how do I set up a study that varies spawn angles x,y and z between 0 and 2pi?

 

regards,

Matthias

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Best Answer

  • Renan
    Renan
    Altair Employee
    edited May 31 Answer ✓

    Hi Matthias,

    In EDEM you can specify the particle orientation using a 3x3 matrix but under the hood EDEM uses quaternions to do the calculations. It seems to me that the HyperStudy Connector is actually picking up those quaternions instead of the 3x3 matrix.
    You can find more about how the 3x3 orientation matrix is connected to the quaternion here.

    Best regards,
    Renan

Answers

  • Renan
    Renan
    Altair Employee
    edited May 31 Answer ✓

    Hi Matthias,

    In EDEM you can specify the particle orientation using a 3x3 matrix but under the hood EDEM uses quaternions to do the calculations. It seems to me that the HyperStudy Connector is actually picking up those quaternions instead of the 3x3 matrix.
    You can find more about how the 3x3 orientation matrix is connected to the quaternion here.

    Best regards,
    Renan

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