Numerical study of the dynamics and mass transport of a helically twisted rectangular prism in simple shear flow*

Utilizing high-fidelity numerical simulations based on the lattice Boltzmann method, the dynamics of a helically twisted rectangular prism in simple shear flow and the transport of mass released from its surface are comprehensively studied. The findings reveal that the helical rectangular prism undergoes lateral movement when subjected to shear flow. This results in unique dynamic characteristics and mass transport behaviors compared to non-helical particles. These insights offer a mechanistic foundation for controlling particle motion by modifying particle shape. The fluid and particle dynamics, along with mass transport characteristics, are analyzed both qualitatively and quantitatively.