why does the fire in a fireplace burn more briskly on a windy day?

Answer 1

Because the wind allows for more oxygen to react with the fire.

Answer 2

The wind blowing across the chimney causes lower pressure at the top the chimney sucking more air in the room of the fire place, oxygen, through the fuel supporting more combustion.

There is a principle involved here but I can not think of the name right now. It is the same principle that causes lift on air craft wings,

Answer 3

The wind creates an updraft (negative pressure) in the chimney causing the exhaust to flow out more quickly, which in turn means that air, or more to the point oxygen, from the room is pulled by the pressure differential into the fire faster.

Answer 4

The wind passing by the top of the chimney, reduced the air pressure, allowing the chimney to draw more gasses from the fireplace, which draws more air into the fire from the house.

Answer 5

Bernoulli's principle. The wind across the mouth of the chimney above lowers the pressure at that point and draws air up the chimney from the higher pressure atmosphere of the room. The increased air flowing from the room, through the fire, and up the chimney acts as a kind of "bellows."

Answer 6

WELL WHEN YOU HAVE A FIRE IN A FIRE PLACE THE LITTLE DOOR SHOULD BE OPEN TO LET THE SMOKE GO OUT THE CHIMENEY. THE WIND TRAVELS DOWN IN THE CHIMNEY AND HENCE THE FIRE BUNS MORE BRISKLY WITH MORE OXYGEN

Answer 7

Because fire needs oxygen to fuel it, wind contains oxygen therefore making the fire burn more quickly.

Answer 8

The negative static pressure creates current which gets more oxygen.

Answer 9

oxygen lots and lots of oxygen