As I live in the U.K., I need to use the dry weather as cleverly as possible for drying my laundry because there ain’t much of this dry weather around. If the wind blows from West to East, would it be better to place the rope for the laundry North-South? Or would it be better to do West to East do the wind would dissipate the water vapours from both sides of the clothing? What’s your theory?
Dave - I would have said you probably want it across the wind because if the wind’s running along your laundry then any moisture evaporates and the front end of the laundry is then going to reduce the evaporation further on. And if you’re going across it then you get lots of turbulence so the air will get to the back fine because it will just go over the top and swirl in the back. If anyone has any bright ideas then I’d love to hear them.
Chris - Yes, I would suggest using a tumble dryer inside which is guaranteed to work unlike the washing I know in this country.
Helen - Oh, Chris, how about the sunshine? Come on, think of the environment. I hang my washing outside.
Chris - Indeed.
Helen - In between the rain showers.
adrian asked the Naked Scientists: Hi naked scientists, As I'm living in the UK, I need to use the dry weather as cleverly as possible for drying my laundry. If the wind blows from West to East, would it be better if I place the rope for the laundry from North to South, or it would be better to place it from West to East, so the wind could dissipate the water vapours from both sides of the clothes? So to place my laundry to oppose as much surface as possible to the wind (and the wind to force out the water from the inside of the material), or to be as aerodynamic as possible? Would this be different depending on the thickness of the material? Many thanks, Adrian What do you think? adrian , Mon, 3rd Aug 2009
What a good question!
I think that the wind should blow across the line. That will 'inflate the articles of double thickness - bags and trousers and maximise the amount of 'fresh' air flowing over and through the clothes.
The wind direction is never constant, just look at a wind vain and it will always be shifting in direction. The reason why you site a vain high is to get a wind direction free (or as free as possible)from the influences from taller buildings and structures.
I suspect, all else being equal, that laundry will dry faster when the lines are parallel to the wind than at right angles. Reason: The wind speed is less obstructed, so that when, at the ambient temperature, water molecules evaporate from the cloth, they are swept away quickly and are less likely to return to the cloth through diffusion, than when the wind speed is more obstructed. Arguably, if the wind speed is high enough that the clothes stands out almost at 90 degrees to the vertical, it will make little difference. However, for lesser winds I think I am right. One complicating factor: the direction of sunlight. If you have anything resembling a clear day, the clothes position will affect the solar cross-section substantially, which would be the most important facter in those conditions. Atomic-S, Tue, 4th Aug 2009
This is how I dry my washing, it is a good way and always dries well !
...don't be fooled by the above photo...the scenic bacground to the washing is just a scenery prop !!..I just happened to place my washing in front of it...this is true !!
Thanks for the clarification; I would have never guessed. Atomic-S, Mon, 10th Aug 2009