Mechanical engineers know How to put the bottle full of drink inside the refrigerator to cool so that it cools faster : horizontally or vertically...
I am always fascinated by the subject Heat Transfer. There are so many cool facts about heat.
HEAT this is something which give me ecstatic feeling. Read on to know the mind-boggling science
behind answer. Treating the bottle full of drink as a thermodynamic closed system.One can readily see, if the bottle needs to be cooled, it needs to release its energy out to the environment so that it cools And the objective is to do this as quickly as possible Natural convective heat transfer plays substantial role in this phenomenon.Rate of natural convection is different for horizontal cylinder and vertical cylinder because of its dependence on effective height or length. If bottle is kept vertical, the effective length is more and if bottle is kept horizontally then the effective height is less. Hence in later case, heat transfer rate from surrounding to bottle is less.
Ultimately we don’t have to release extra energy and it takes less time to cool otherwise as we cool bottle, it gets heated up at faster rate in case of vertically position so time for cooling increases. Actually time required to cool in the vertical position for the drink bottle (if dimensions of axial length is assumed about 5 times that of the diameter) is 50 % longer than that required when the bottle is kept in horizontal position inside the refrigerator. Chill that drink quickly by placing it horizontally inside the fridge. It is just awesome fact which only MechiezZ know, isn't it ?
HEAT this is something which give me ecstatic feeling. Read on to know the mind-boggling science
behind answer. Treating the bottle full of drink as a thermodynamic closed system.One can readily see, if the bottle needs to be cooled, it needs to release its energy out to the environment so that it cools And the objective is to do this as quickly as possible Natural convective heat transfer plays substantial role in this phenomenon.Rate of natural convection is different for horizontal cylinder and vertical cylinder because of its dependence on effective height or length. If bottle is kept vertical, the effective length is more and if bottle is kept horizontally then the effective height is less. Hence in later case, heat transfer rate from surrounding to bottle is less.
Ultimately we don’t have to release extra energy and it takes less time to cool otherwise as we cool bottle, it gets heated up at faster rate in case of vertically position so time for cooling increases. Actually time required to cool in the vertical position for the drink bottle (if dimensions of axial length is assumed about 5 times that of the diameter) is 50 % longer than that required when the bottle is kept in horizontal position inside the refrigerator. Chill that drink quickly by placing it horizontally inside the fridge. It is just awesome fact which only MechiezZ know, isn't it ?
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