Question with particle body force

Raheem Sterling_22160
Raheem Sterling_22160 Altair Community Member
edited October 2023 in Community Q&A

Hi,

I'm planning to use particle body force(PBF) to make the total force on particles in the z-direction zero, but how can PBF return a specific component? 

For example, in x and y direction with +=, but in z direction with =0.0.

Thanks

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited October 2023

    Hi Raheem,


    If using the latest version of the API you can use results.force.component to return individual component of theforce. e.g.

        results.force.x += calcualted_value;
        results.force.y += calcualted_value;
        results.force.z = 0.0;

     

    The older version of the API has the format:

        calculatedForceZ += calcualted_value;
        calculatedForceY += calcualted_value;
        calculatedForceX = 0.0;

     

    Best to be aware the latest versions of the API Body Force will overwrite forces calculated in the chain if using = however the older version will not overwrite contact forces, only overwrite forces calculated in the body force.  

     

    Regards

    Stephen

  • Raheem Sterling_22160
    Raheem Sterling_22160 Altair Community Member
    edited October 2023
    Stephen Cole_21117 said:

    Hi Raheem,


    If using the latest version of the API you can use results.force.component to return individual component of theforce. e.g.

        results.force.x += calcualted_value;
        results.force.y += calcualted_value;
        results.force.z = 0.0;

     

    The older version of the API has the format:

        calculatedForceZ += calcualted_value;
        calculatedForceY += calcualted_value;
        calculatedForceX = 0.0;

     

    Best to be aware the latest versions of the API Body Force will overwrite forces calculated in the chain if using = however the older version will not overwrite contact forces, only overwrite forces calculated in the body force.  

     

    Regards

    Stephen

    Hi Stephen, 

    Now I am using the API with NExternalForceTypesV3_0_0::SResults in EDEM 2022.1, for return value of results.force, there are no  choice of indibvidual component like results.force.z, only results.force.getZ() or results.force.setZ().

    Regards!

    Raheem

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