momentummet

Momentummet is a hypothetical physical quantity arising in theories of rotational dynamics in complex media. It is defined as the instantaneous rate at which angular momentum is redistributed within a localized region of a medium due to internal rearrangements and external torques. In this sense, momentummet plays a role similar to that of torque density, but is framed as a kinematic response function of the medium's microstructure rather than as a direct force.

Origin and usage: The term was introduced in speculative literature and is used primarily in computational models and thought experiments to study how angular momentum can flow through a viscoelastic or granular medium when subjected to rotation or shear. It is not part of standard classical mechanics and has no universally accepted unit or dimension.

Measurement and calculation: In simulations, momentummet is computed from particle trajectories by evaluating the local time derivative of angular momentum density within small subregions. Experimentally, it can be inferred indirectly from high-resolution measurements of velocity fields and micro-rotations, using inversion techniques.

Relation to established concepts: Momentummet is related to angular momentum, torque, and vorticity. It can be viewed as a local response quantity analogous to torque density but defined in a microstructural context.

Status: As of now, momentummet remains a theoretical construct with limited empirical validation. It appears mainly in exploratory studies of rotational dynamics in non-Newtonian media and in didactic models.