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Clothes dry faster in strong wind. What is the micrometeorological reason?

Answer and explanation

Correct answer: Wind removes the moist boundary layer near clothes

Direct answer: A, wind removes the moist boundary layer near the clothes. Water on wet fabric evaporates into the thin layer of air touching the fabric. This layer quickly becomes humid, so the difference between the vapour pressure at the wet cloth and in the nearby air becomes smaller. Strong wind mixes away that humid air and replaces it with comparatively drier air. The larger moisture gradient allows more water molecules to escape from the fabric, so drying is faster. Wind does not destroy water vapour; it transports and mixes it. B is wrong because wind does not normally turn the water on clothes into ice. C is scientifically impossible: vapour remains matter in the air. D is wrong because wind does not always make temperature fall below freezing, and drying occurs at ordinary temperatures too. Temperature, humidity, exposed surface area, and airflow can all affect drying. Memory cue: wind renews the air at the surface; it does not remove water by magic.

Related tags

Boundary LayerWindEvaporationMicrometeorologyHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeography

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