MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
Cannot get out of the habit even though I am sure it has no effect what so ever.
it has an immediate and profound effect, making you look like a small child
In theory yes. Blowing removes the hot air around your food and replaces it with cooler air which allows heat to transfer away from your food. Its probably a tiny effect though.
I have found that it can be rather messy when eating a Sherbet Fountain
ermmm it cools it down 😕
Blowing on food moves the hot air (around the hot food) away and brings new, cooler air into contact with your food. Repeatedly doing this cools the food - simples!
It also increases evaporative cooling, though the usefulness depends on the surface area to mass ratio.
Certainly rapidly cools down a spoonful of hot soup.
So, yes, actually. 😀
Come on, my three year old daughter could have answered this.
King's Law
Depends... are you eating a mars bar?
you've got to be careful with the gravy though
Would sucking air back across your food not work better as it's likely that the air you blow out is warmer than the air you blow back over it. Obviously one would have to also consider that the composition of the air blown as opposed to sucked would be different.
but wouldn't that be slurping? is slurping allowed?
Would sucking air back across your food not work better as it's likely that the air you blow out is warmer than the air you blow back over it. Obviously one would have to also consider that the composition of the air blown as opposed to sucked would be different.
In theory the air is cooler so yes, better. But you can't create the localised high velocity that you can with a blow, so my guess is that it'd be worse in reality. However that assumes that the speed of airflow is the limiting factor.
read the first chapter of [url= http://www.amazon.co.uk/Six-Easy-Pieces-Fundamentals-Explained/dp/0140276661 ]six easy pieces[/url]. explains the movement of atoms (and molecules) and thus how blowing on soup really does cool it down faster
But you can't create the localised high velocity that you can with a blow,
Your absolutely right of course a good blow can often result in a high velocity ...
What if your food is on a conveyor belt?
You need the high velocity of a good puff to break up the boundary layer - see the new generation of hand dryers.
I keep asking my G'friend to blow my sausage.........To no avail.
It takes a long time to heat up food by blowing on it!