Final answer:
The second sink of a three-compartment sink is for rinsing items, and a drain device is used to speed up the flow of water, possibly by inducing a vortex.
Step-by-step explanation:
The second sink in a three-compartment sink is typically used for rinsing washed items to remove any soap residue and remaining debris after they have been cleaned in the first sink.
The goal of a device in the sink drain, which might be referenced in the given material, is to improve water flow, although the exact mechanism isn't fully described in the question.
In general, sink drains can include features like a garbage disposal or specialized drain inserts to prevent clogging and facilitate a swift water flow.
For instance, devices with fins or angled surfaces may induce a swirl in the outgoing water that helps draw material down the drain more efficiently by creating a small vortex that enhances the speed of drainage.