air present, current of air, wind - air going (in some cases with significant pressure) from a region of higher force to a region of low pressure; "trees bent under the fierce winds"; "when there's no wind, row"; "the radioactivity was staying swept upwards with the air existing and https://thermal-shock-vs-thermal80123.mybuzzblog.com/15972052/what-does-best-practices-for-thermal-shock-testing-mean