Sand velocity depending on the flow velocity
 

Hello,

I am trying to simulate granular flow using Eulerian mode. I have a problem with defining the velocity of the secondary phase (sand). The velocity of the primary phase is defined as velocity magnitude and it is equal to 4.5 m/s. I want to redefine the velocity of the secondary phase as stated in the attached pictureAttachment 57253

I think I should use UDF, but am not sure how. Please assist me.

Please assist me

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