What is thermal layering concept regarding fires?
114177
About fighting fires or about what happens in them?
1147489
Fire is supposed to be a plasma and/or energy. It goes up because the expanded gasses in the flame "weigh" less than cool air (like a hot air baloon). It doesnt have a shape. it adapts to the shape of the container. It looks like a drop because of the hot air "pulling" it up.
131453
Fire needs three things fuel, oxygen, and heat.  If you put sand over a fire it cuts off its oxygen.  If you put water over fire it cuts of its heat or energy.  If you reach in and take out all the fuel it will distingusih.  I wouldn't try the last one though lol.
89873
Best heat transfer should occur with a good thermal conductor like copper, to carry the absorbed heat away, coated with a thin heat-conducting layer of flat black, may be an oxide of copper.
1168728
The concept is "flame propagation speed."  See the reports below.  Unfortunately my reference books are about 15 miles from here, but the data in the reports sounds about the same with some other work I've done\n\nUsing the rough estimate of 1 meter/per second flame speed, that would work out to a bit over 2 miles per hour (mph), or a medium walking pace.
113745
You should be able to find the answers on these web pages:\n\nhttp://www.uni.edu/~iowawet/H2OProperties.html\nhttp://dl.clackamas.cc.or.us/ch106-06/thermal.htm\nhttp://daphne.palomar.edu/jthorngren/latent.htm
919229
FIRE is rapid oxidation.  It is a chemical reaction between oxygen  and other materials (solid or liquid).  The flame you see is the point at which the material is converted into a gas.  This point is called the sublime.\n  To maintain sublimation (flame) you must have a constant supply of materials (solid or liquid) and a constant supply of oxygen.  \n  Fire is made by raising the temperature of a material (solid or liquid) to its point of sublimation in an oxygen filled enviornment.\n  FYI,  RUST is slow oxidation
129713
MeghnarMajhi is right.\n\nTemperature <==> Heat
689682
check this site. it might help.. though i think this is a course outline for fire fighting students
800927
dont know about q1\n\nQ2 They push the heat out at the floor because the coler air is at the bottom of the floor and since hot air rises then then the hot air will circulate more by rising through the cooler air and warming it up as opposed to being near the ceiling where the hot air would just stay near the ceiling.\n\nQ3 The smoke is usually heated and composed alot of carbon monoxide. The heated smoke will rise as it is warmer than the cooler air around it, once it cools down to the temperature around it than it will usually fall back down since carbon monoxide is heavier than air and that it will also combine with other elements in the air.\n\nQ4 A continuous hot water system works better because the the hot water is circulated throughout whatever system it is heating, such as air or other water then return back to the heater (furnace) not cooled completely and still retaining some of the heat it originally had and since it is already warm it takes less energy and time to heat it back up to its original temperature.
130348
Incipient this is the building stage of fire.\nFree burning this is the stage of fire when all the condition are right. temperatures at cieling height can get well over 1000 degrees.\nSmoldering in this stage the fire has exhausted all of its oxygen and cannot complete the combustion process. Heat and fuel are still availabe but not oxygen. It is during this time that that the introduction of oxygen say by opening a door or window that a backdraft could occur. That is one reason firefighters cut vent holes in roofs so that they evacuate all the heat and flammable gases up and out of the structure
242191
everything can burn at a high enough temp\nthey melt before burning because of physical properties\nit is part of the solid-liquid-gas chain\n***get smarter, dude, it is possible, have you ever thrown water on a fire that was 50,000 degrees?
794929
Fire is an exothermic reaction because it releases energy.\nIf the temperature increases, it's because the heat is getting out of the molecule and therefore the reaction releases energy: which means it is exothermic.
128599
My understanding is that in those cases when there is a fire inside (typically in a "lamp", traditionally a stone vessel burning seal oil, or something, since there is not much vegetation in a lot of these places), that a chimney/ventilation hole is placed in the ceiling to let the smoke and heat out a bit. The second reference includes a drawing from Martin Frobisher's 1576-1578 expedition to Baffin Island, showing windows (which could also function as ventilation holes) in the igloos. Windows were traditionally made from fresh water ice, and were valuable enough that when the igloo was abandoned, the inuit took the window pane with them. \n\nThe previous response is also correct, I believe. Ice and snow are a good insulators (this is why lakes do not freeze solid very often even when it is very very cold). Therefore, not a lot of heat is required to make an igloo quite warm inside, even when the temperature outside is very cold. Why doesn't the igloo melt? There is a substantial heat of fusion that is required to melt snow or ice. The radiant heat from the fire just melts the inner layer of snow to create an ice glaze. Most of the heat is reflected back as well because of the color of the snow. \n\nI have attached a reference from a person who did some experiments with igloos.
679431
I think you mean why does water extinguish fir. Because it forms a layer of water over the combustable material which prevents oxygen getting at it. Fire needs heat, oxygen and a combustable material to continue. No oxygen-no fire.
769196
When construction has to be fire rated it has to withstand the temperature as shown in your question. For example 30 minute fire rate door should not burn at temp 1550F during the 30 minutes. 4hr rated wall must still be standing even if subjected to constant temperature 200F during 4 hour period. This applies to all following passive protection systems such as firestops, fire doors, wall and floor assemblies, etc., which are used in compartmentalization in buildings and the petrochemical industry in Europe and North America. A fire-resistance rating typically means the duration for which a passive fire protection system can withstand a standard fire endurance test. This can be quantified simply as a measure of time, or it may entail a host of other criteria, involving other evidence of functionality or fitness for purpose but Time Temperature curve is important part of the test.\nHappy Thanksgiving to you too.
795410
this has to do with the density of air. As the molecules in the air heat up the start moving at higher speeds in all directions, spreading them apart, and as the density decreases, the air rises. With fire this happens at higher speeds.