Local nanoflow field produced by the bladed rotor in a rotation transmission nanosystem in water environments

A rotation transmission nanosystem (RTnS) is an essential component of a nanomachine for transferring an input rotational frequency (omega M) into an output frequency (omega R) via a nanobearing. The ratio of omega R to omega M illustrates the rotation transmission efficiency (RTE) of the system. In this study, a bladed rotor in an RTnS is driven to rotate in a water box. Using the molecular dynamics simulation approach, the water-rotor interaction is investigated. The nanoflow field in the water box is traced. Some remarkable conclusions have been drawn for the design of the nanosystems potentially applied in a nanomachine. For example, the present rotor with uniformly assembled blades guarantees a stable rotation transmission when volume fraction of water Vf > 50%. RTE can be accurately controlled by adjusting the height of the blades. The average rotational frequency of the water cluster is much lower than that of the rotor. When 100% > Vf > 50%, the bubble has breathing vibration that produces the second-order basic frequency of the water cluster.

Automated summary

In this study, the interaction between the bladed rotor and water in a rotation transmission nanosystem is investigated using molecular dynamics simulation. Several important conclusions are drawn for the design of nanomachines, including the ability to control rotation transmission efficiency by adjusting the height of the blades.