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Particle Positioning

User: "Johnson"
Altair Community Member
Updated by Johnson

Good day,

Please, I was wondering if there is a systematic approach to position this particle at 120 degrees from each other as shown in the picture below rather than guessing the position of the particle through trial and error, which I have done below.

Thank you

image.png

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    User: "jerrinjobs"
    Altair Employee

    Hi Johnson

    The particle position always refers to the center of mass of the particle. So the position you are looking for is
    X = (L/2)*(1+cos 60)
    Z = (L/2)*(sin 60)

    Hope this helps.

    Thanks,
    Jerrin Job

    User: "Johnson"
    Altair Community Member
    OP
    Updated by Johnson

    Thank you, Jerrin, for the information. the Formula actually gave me something close as seen below.

    image.png

    But I actually wanted the particles to be tangential to each other as seen in the image, which I obtained manually by just changing the numbers

    image.png

    my question now is, how did you come about the formula below you shared earlier, and are there any resources you can recommend for me to really understand this particle position

    X = (L/2)*(1+cos 60)

    Z = (L/2)*(sin 60)

    User: "jerrinjobs"
    Altair Employee

    Hi Johnson

    My assumption was that all your particles are of the same length. In case of different lengths, it would be
    X = (L_particle0 / 2) + ((L_particle1 / 2) * cos 60)
    Z = (L_particle1 / 2) * (sin 60)

    This comes from basic trigonometry of lines in space.

    Hope this helps.

    Thanks,
    Jerrin Job

    User: "Johnson"
    Altair Community Member
    OP

    Thank you, Jerrin