0 present participle of swirl
1 to move quickly with a twisting, circular movement, or to make something do this:
The overflowing river swirled around them.
Accusations swirled around Washington last week of partisan vendettas and turf wars.
Already, speculation is swirling that the company is a takeover target.
Conflicting reports have swirled around the status of the Secretary of State.
Upstream of the point of breakdown flow is steady and swirling.
The effect of the swirling flow downstream can be to cut off a mode which is cut on upstream of the fan.