What does むわって /muwatte means in this context?

Question

I met this in a sentence that describe a sweet scent in the air, but don't understand this part

甘い香りがむわって漂ってきてる

Answer 1

むわっ is a variant of an onomatopoeia むわり.

(っ)て is a colloquial version of と.

So むわって means 「むわっ」と, or 「むわり」と.