It is possible that fluid may circulate in a region either vortically or non-vortically.

to excite a dynamo

So he was quite peremptory when a slight, soft-spoken man in a guayabera, trousers, and sandals began chatting with him and did not seem likely to stop.

We did it on the smell of an oily rag, says Danielle Kootman of Tourism Queensland.