the concept--
a hot air balloon rises from the convection of cold air rushing into the balloon, around the edges, and increasing speed, due to the small opening in the balloon, that leads into the large area, that the hot air is blown into, acting as a venturi...cold air rushes to the warm air, to become heated( joining the jumble of hot air), thus increasing the cold air's, "harmonic resonance"(see "harmonic resonance" post), this increased speed, creates a low pressure area, around the rim of the balloon's opening, but... in the center of the balloon, there is "thermal reversion"( as seen in automobile engines), if this is correct, warm air should be felt coming out, of the direct center of the balloon, and into the basket--
the how--
some heat is lost through the balloon's outer layer, to the cooler air outside the balloon, from the small "air-halo", or "air-pocket", very near the balloon's skin( all objects in our atmosphere have them, see "thermo-dynamics front-to-back" post)...the cold air, and warm air, jumble in, and mix( cold air molecules join the jumble, and hot air molecules are kicked out...radiating hot molecules)--
once the "thermal differential" between hot air in the balloon, and the air outside, begin to equalize, the balloon starts to drop, as there is no, or not enough, hot air, coming out of the balloon's opening, pushing it upward...and no cold air coming in( through the outer edges of it's opening), up the sides, and "convecting" in the balloons bulb--
note--
i suggest, that hot air is not lighter than cold air, and that they are the same weight, the difference is, one has a greater number of collisions per second, than the other...i feel, that a balloon with hot air only, that has been sealed( no opening), will not rise...( an untested concept)--
hero's engine--
"hero's engine", utilizes the same concept, and has a narrow opening( venturi), that hot air flows out of, creating a simple "thermal engine"...although "hero's engine" uses heat from the outside of the device, to heat the air inside, instead of the hot air being blown into it, the concept remains the same, as well as the result--
summary--
yes, in your home there is hotter air nearest the ceiling, but, i think this may be only due to the ground being the "cold air source"...meaning, in the winter the ground is frozen, and the air from the ground( trying to thaw), "convecting" to the hot air in the ceiling, thus draws cold air in, from outside your home, closest to the ground( a "draft"), and then radiates heat out the roof, and other areas near the top of the structure( basically, it works like a comet does, where the coldest side looses temperature, in the direction of the hot side of the comet, in a regular cycle)--
best wishes, john kruschke--
(cs)
a hot air balloon rises from the convection of cold air rushing into the balloon, around the edges, and increasing speed, due to the small opening in the balloon, that leads into the large area, that the hot air is blown into, acting as a venturi...cold air rushes to the warm air, to become heated( joining the jumble of hot air), thus increasing the cold air's, "harmonic resonance"(see "harmonic resonance" post), this increased speed, creates a low pressure area, around the rim of the balloon's opening, but... in the center of the balloon, there is "thermal reversion"( as seen in automobile engines), if this is correct, warm air should be felt coming out, of the direct center of the balloon, and into the basket--
the how--
some heat is lost through the balloon's outer layer, to the cooler air outside the balloon, from the small "air-halo", or "air-pocket", very near the balloon's skin( all objects in our atmosphere have them, see "thermo-dynamics front-to-back" post)...the cold air, and warm air, jumble in, and mix( cold air molecules join the jumble, and hot air molecules are kicked out...radiating hot molecules)--
once the "thermal differential" between hot air in the balloon, and the air outside, begin to equalize, the balloon starts to drop, as there is no, or not enough, hot air, coming out of the balloon's opening, pushing it upward...and no cold air coming in( through the outer edges of it's opening), up the sides, and "convecting" in the balloons bulb--
note--
i suggest, that hot air is not lighter than cold air, and that they are the same weight, the difference is, one has a greater number of collisions per second, than the other...i feel, that a balloon with hot air only, that has been sealed( no opening), will not rise...( an untested concept)--
hero's engine--
"hero's engine", utilizes the same concept, and has a narrow opening( venturi), that hot air flows out of, creating a simple "thermal engine"...although "hero's engine" uses heat from the outside of the device, to heat the air inside, instead of the hot air being blown into it, the concept remains the same, as well as the result--
summary--
yes, in your home there is hotter air nearest the ceiling, but, i think this may be only due to the ground being the "cold air source"...meaning, in the winter the ground is frozen, and the air from the ground( trying to thaw), "convecting" to the hot air in the ceiling, thus draws cold air in, from outside your home, closest to the ground( a "draft"), and then radiates heat out the roof, and other areas near the top of the structure( basically, it works like a comet does, where the coldest side looses temperature, in the direction of the hot side of the comet, in a regular cycle)--
best wishes, john kruschke--
(cs)
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