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Why does wind help clothes dry more quickly if the evaporation rate stays constant?
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Why does wind help clothes dry more quickly if the evaporation rate stays constant?
The evaporation rate is based on the air in contact with the surface or moisture. Increase the flow of air past the clothes and more air mass will contact the surface. The transfer rate has not increased just the mass of air. Also the transfer rate will drop as the air’s humidity changes. Replace that air with new air and the rate won’t decrease.
The evaporation rate is based on the air in contact with the surface or moisture. Increase the flow of air past the clothes and more air mass will contact the surface. The transfer rate has not increased just the mass of air. Also the transfer rate will drop as the air’s humidity changes. Replace that air with new air and the rate won’t decrease.
Your assumption that the evaporation rate stays constant is completely incorrect. When you consider a situation where there is no wind blowing, then the wind starts blowing 30 mph, those clothes are going to dry 5 or 6 times as fast. That equates to a greatly increased evaporation rate, as the wind picks up and carries away water molecules from that clothing.
Sunlight, wind, outdoor temperature, humidity, and other variables can affect the evaporation rate of damp clothing hanging on an outdoor line.
Your assumption that the evaporation rate stays constant is completely incorrect. When you consider a situation where there is no wind blowing, then the wind starts blowing 30 mph, those clothes are going to dry 5 or 6 times as fast. That equates to a greatly increased evaporation rate, as the wind picks up and carries away water molecules from that clothing.
Sunlight, wind, outdoor temperature, humidity, and other variables can affect the evaporation rate of damp clothing hanging on an outdoor line.
With the movement of the air, the moisture laden air close to the clothes is moved away so that drier air is moved close to the clothes and then more water is moved from the clothes to the air.
With the movement of the air, the moisture laden air close to the clothes is moved away so that drier air is moved close to the clothes and then more water is moved from the clothes to the air.
The evaporation rate depends on two quantities, the temperature and the humidity. Evaporation requires energy so when it occurs the temperature falls and the humidity rises due to the evaporation itself as well as the falling temperature, thus slowing evaporation. When the air flows by the wet garment, whether due to wind or a fan, the cooler, damp air is replaced by drier, warmer air and the evaporation rate returns to its initial value.
The evaporation rate depends on two quantities, the temperature and the humidity. Evaporation requires energy so when it occurs the temperature falls and the humidity rises due to the evaporation itself as well as the falling temperature, thus slowing evaporation. When the air flows by the wet garment, whether due to wind or a fan, the cooler, damp air is replaced by drier, warmer air and the evaporation rate returns to its initial value.
Without movement of air, the air becomes saturated. With the movement of air, the air (next to the clothes) doesn’t become saturated — water keeps on evaporating (into the “new” air).
Without movement of air, the air becomes saturated. With the movement of air, the air (next to the clothes) doesn’t become saturated — water keeps on evaporating (into the “new” air).
It blows away water molecules in addition to the normal evaporation. If I am drying something out outside, like an ice chest, I’ll always orient it into the wind so the wind can dry out the interior.
It blows away water molecules in addition to the normal evaporation. If I am drying something out outside, like an ice chest, I’ll always orient it into the wind so the wind can dry out the interior.
The evaporation rate is based on the air in contact with the surface or moisture. Increase the flow of air past the clothes and more air mass will contact the surface. The transfer rate has not increased just the mass of air. Also the transfer rate will drop as the air’s humidity changes. Replace that air with new air and the rate won’t decrease.
The evaporation rate is based on the air in contact with the surface or moisture. Increase the flow of air past the clothes and more air mass will contact the surface. The transfer rate has not increased just the mass of air. Also the transfer rate will drop as the air’s humidity changes. Replace that air with new air and the rate won’t decrease.
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Your assumption that the evaporation rate stays constant is completely incorrect. When you consider a situation where there is no wind blowing, then the wind starts blowing 30 mph, those clothes are going to dry 5 or 6 times as fast. That equates to a greatly increased evaporation rate, as the wind picks up and carries away water molecules from that clothing.
Sunlight, wind, outdoor temperature, humidity, and other variables can affect the evaporation rate of damp clothing hanging on an outdoor line.
Your assumption that the evaporation rate stays constant is completely incorrect. When you consider a situation where there is no wind blowing, then the wind starts blowing 30 mph, those clothes are going to dry 5 or 6 times as fast. That equates to a greatly increased evaporation rate, as the wind picks up and carries away water molecules from that clothing.
Sunlight, wind, outdoor temperature, humidity, and other variables can affect the evaporation rate of damp clothing hanging on an outdoor line.
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Wet clothes hanging on a clothesline dry due to evaporation. The water in them evaporates into the atmosphere.
Thus, any factor that increases the amount of air that passes by the garment, like wind, will hasten the drying process.
Wet clothes hanging on a clothesline dry due to evaporation. The water in them evaporates into the atmosphere.
Thus, any factor that increases the amount of air that passes by the garment, like wind, will hasten the drying process.
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Obviously the evaporation rate increases when wind blows. Your assumption is erroneous.
Obviously the evaporation rate increases when wind blows. Your assumption is erroneous.
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With the movement of the air, the moisture laden air close to the clothes is moved away so that drier air is moved close to the clothes and then more water is moved from the clothes to the air.
With the movement of the air, the moisture laden air close to the clothes is moved away so that drier air is moved close to the clothes and then more water is moved from the clothes to the air.
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The evaporation rate depends on two quantities, the temperature and the humidity. Evaporation requires energy so when it occurs the temperature falls and the humidity rises due to the evaporation itself as well as the falling temperature, thus slowing evaporation. When the air flows by the wet garment, whether due to wind or a fan, the cooler, damp air is replaced by drier, warmer air and the evaporation rate returns to its initial value.
The evaporation rate depends on two quantities, the temperature and the humidity. Evaporation requires energy so when it occurs the temperature falls and the humidity rises due to the evaporation itself as well as the falling temperature, thus slowing evaporation. When the air flows by the wet garment, whether due to wind or a fan, the cooler, damp air is replaced by drier, warmer air and the evaporation rate returns to its initial value.
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Without movement of air, the air becomes saturated. With the movement of air, the air (next to the clothes) doesn’t become saturated — water keeps on evaporating (into the “new” air).
Without movement of air, the air becomes saturated. With the movement of air, the air (next to the clothes) doesn’t become saturated — water keeps on evaporating (into the “new” air).
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The evaporation rate may stay constant, but the re-condensation rate is greatly reduced as the water molecules are carried away.
The evaporation rate may stay constant, but the re-condensation rate is greatly reduced as the water molecules are carried away.
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It blows away water molecules in addition to the normal evaporation. If I am drying something out outside, like an ice chest, I’ll always orient it into the wind so the wind can dry out the interior.
It blows away water molecules in addition to the normal evaporation. If I am drying something out outside, like an ice chest, I’ll always orient it into the wind so the wind can dry out the interior.
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Can wind cause evaporation?
YES!
Evaporation occurs when the air above the water is at less than 100% humidity -
At 100% there is the same amount of water condensing as evaporating
If the air is very still then a layer of 100% humidity air over the water stops or at least reduces further evaporation
The wind removes this layer and replaces it with fresh (dry) air.
The water will then continue to evaporate.
Can wind cause evaporation?
YES!
Evaporation occurs when the air above the water is at less than 100% humidity -
At 100% there is the same amount of water condensing as evaporating
If the air is very still then a layer of 100% humidity air over the water stops or at least reduces further evaporation
The wind removes this layer and replaces it with fresh (dry) air.
The water will then continue to evaporate.
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