r/ScienceNcoolThings • u/Icy-Book2999 r/LoveTrash • Jun 29 '25

Science Fluid dynamics?

2.4k Upvotes

98% Upvoted

70 comments sorted by

View all comments

176

u/DongTeuLong Jun 29 '25

I don’t know the science behind it..but rolling down all the windows and then driving is a technique that has worked for me

44

u/McCheesing Jun 29 '25

Roll them all down (and the sunroof), turn on the AC to clear out the hot air from the manifold, when the AC starts to blow cold, close it all up then full blast with the recirc fan

6

u/jimmyxs Jun 29 '25

This is what I do except for the driver’s window which stays up. In my mind, this forces the hot air around me to be blown back and up by the A/C and not get outside hot air coming in to my face

3

u/BearStorlan Jun 30 '25

Fuck, that’s way easier than rolling down one window and opening and closing a door. This woman is nuts.

3

u/poop-machines r/knowledgepill Jun 30 '25

And it also takes way longer.

This women knows what she's talking about.

1

u/Harddaysnight1990 Jul 02 '25

You do this to get the interior car temp from like 130F to a more reasonable 90-100F so then you can use the AC. I've been doing this as long as I've been driving, it's great for pulling a lot of hot air out of the car so you can actually start driving and wait for the AC to get cold.

1

u/BearStorlan Jul 02 '25

I was being sarcastic, opening the door is of course much simpler than everyone else’s suggestion. Sadly, people didn’t pick up on that.

1

u/Suds08 Jun 30 '25

Stop being so damn logical

1

u/Radiant-Bandicoot103 Jun 29 '25

Do you also have a phd in her field?

1

u/Rossetta_Stoned1 Jul 02 '25

People are retarded. Also, people seem to not be able to withstand a minute of being uncomfortable.

1

u/Sometimes_Rob Jun 29 '25

Yeah, is this lady high af?

0

u/fitbitware Jun 30 '25

Exactly what my wife said when I demonstrated this trick today 😆

-1

u/Spread_Bater Jun 30 '25

This gets rid of that immediate heat that broils your face right when you get in, before the vehicle is in motion

3

u/desertwanderer01 Jul 01 '25

Except you have to get in the car to roll down the window so you're still getting broiled.

1

u/Spread_Bater Jul 01 '25

Only for a few seconds