Why does fire go against gravity?

Women or balls?

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Here comes old rosie shes looking mighty fine
Here comes hot nancy shes steppin right on time
There go the street lights bringin on the night
Here come the men faces hidden from the light
All through the shadows they come and they go
With only one thing in common
They got the fire down below

Here comes the rich man in his big long limousine
Here comes the poor man all you got to have is green
Here comes the banker and the lawyer and the cop
One thing for certain it aint never gonna stop
When it all gets too heavy
Thats when they come and go
With only one thing in common
They got the fire down below

It happens out in vegas happens in moline
On the blue blood streets of boston
Up in berkeley and out in queens
And it went on yesterday and its going on tonight
Somewhere theres somebody aint treatin somebody right

And hes looking out for rosie and shes looking mighty fine
And hes walking the streets for nancy
And hell find her everytime
When the street light flicker bringing on the night
Well theyll be slipping into darkness slipping out of sight
All through the midnight
Watch em come and watch em go
With only one thing in common
They got the fire down below

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Quote:

Sunday, April 13, 2008
MIT Confirms Laws of Physics Apply to Celebrities

In a discovery that is sure to rock large segments of America, the Massachusetts Institute of Technology has confirmed that the laws that govern the physical properties of the universe apply equally to Celebrities and the rest of the population.

"We have found that gravity, for example, pulls grossly overloaded aircraft to earth at 9.9 meters per second squared," says MIT Professor Cyril H. Hutch, "and we have found this to be the case for Aliyah. Losing control of an airplane at night in hazy conditions when you are not instrument rated is often fatal, even for John F. Kennedy Jr. The very same gravity pulls equally on Cher's tits and anyone else's. It is a bad idea for anyone to ride with a shitfaced driver, even Princess Di. And no difference was found in the ignition temperature of Richard Pryor or any other person."

Professor Hutch added, "While the medical sciences are somewhat out of my field, I suspect that consuming obscene amounts of alcohol and drugs can kill the average human being at the same rate as, say, Chris Farley or Janis Joplin."

The Screen Actor's Guild responded with this brief statement. "We at the Screen Actor's Guild find MIT's conclusions extremely suspicious. Everyone knows that John F. Kennedy Jr. could do anything he set his mind to. Celebrities and star athletes aren't like the rest of us. If they were, we wouldn't adore them the way we do. They are unique beings in the universe."

http://www.brokennewz.com/displaystory.asp_Q_storyid_E_311mit

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I remember a discussion of containing a fire in a zero gee atmosphere in Larry Niven's Integral Trees. The story takes place in the smoke ring, a planetless gas torus created, by the stability of Lagrangian three body problem. In the story, a fire must be contained and nurtured in zero gee, consequently a flue must be created by forcing air over the combustion chamber since gravity is not available by off gas buoyancy. In addition the coals must be contained in a region by a wire grid. To some extent this whole description of the fire containment in this work of fiction reminded me of a zero g Rocket Stove..

Rap

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Larry Niven, one of my all time fave hard SF writers!

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Phoenix had it right

but its interesting to see how people think,
some got the approach of "things are like this because they work better this way"
as opposed to "they were like this at first, so we had to find a way to make them work for us"
I can only imagine what would happen if fire didn't go against gravity though. Confused

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It's easy to make a fire "go against gravity"; a high pressure gas-fed flame can do just that.

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Chumly wrote:

It's easy to make a fire "go against gravity"; a high pressure gas-fed flame can do just that.

You'll also need to mechanically force the flue.

Rap

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Nah, with oxy-acetylene you can fire upside-down, no flue needed.

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In zero g, combustion is supported only by the diffusion of the oxidant to the fuel. In a gravity field that oxidant is supplied by a draft. Similarly and oxyacetylene torch supplies that oxidant (oxy) mechanically along with the fuel (acetylene), so it can forcefully act against (and without) gravity.

Rap

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It's the thrust of the projected gases (as supplied by tank pressure) from the nozzle that "allows" the flame to burn "upside-down".

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The movement of combustion products around the heat source in zero gravity are governed by molecular diffusion (which is much slower compared to transport rates in the presence of gravity). We might then expect fire not only to burn in a sphere but also to be less 'lively' in zero gravity.

Colour of the flame gives an indication of its temperature, blue is considered more hot that red and yellow. This explains why burning coals turn red, their flame yellow and welding torch fire is usually blue.

whoever said "there is more to it than it meets the eye" had a point

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@mngunim,

yes, fire goes against gravity. ever watched the slow burning of a rusted nail in a wall? the stain on the wall is also upwards.. i played with a circuit using the high voltage transformer of an old color television set. i wanted to see what color flames could be generated and what their temperatures was. one of the flames was black, so much so that i couldn't see through it and it had a thin deep violet edge. the thing is, the heat that came from it went side ways. i triple checked, also, the heat seemed different, very dry and far more intense. i now realize that hot air balloons for example, don't tell us all they should. maybe am naive.. but i think that fire holds the key to anti gravity? perhaps. anyway, i just wanted to say that not all kinds of fire go against gravity.

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Why does fire go against gravity?

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