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Global equation for determination of terminal velocity

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Hi all,

I am currently modeling the sedimentation of a sphere. I have formulated the following global equation for its acceleration. However, the term intop1(spf.T_stressz) always remains 0. Does anyone know why and how I can incorporate the drag force into the model?

Global Equation: (intop1(-spf.T_stressz)-massg_const+volumeg_const*density_water)/mass-vst

Thank you!


0 Replies Last Post 5 apr 2022, 20:44 GMT-4
COMSOL Moderator

Hello Alexander A

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