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Insurance are trying to worm out of paying for my garage/shed roof where the felt covering was ripped off by a strong gale.
By chance I saw something on "Winterwatch" last night where they said their expert had calculated their shed roof had experienced 6 tons of lift in a storm similar to an aircraft wing. Looking at the profile of my roof I think it would also behave like a wing and suspect the felt was "sucked off". I'd like to simulate this - are there any free online tools where I can put in dimensions and test this out?
Shed/garage side profile is as below.... Where I wrote vacuum is where I think the low pressure would occur and corresponds with the damage.
EDIT - Ignore picture, it didn't work!
WIND------------------>
.......x ------------->
...x.......x vacuum? ----------------->
x..............xxxxxxxxxxxxxxxxxxxxxxxxxxx
x........................................x
x........................................x
x........................................x
x........................................x
x........................................x
x........................................x
MY OH is a bit of a wiz in [url= http://www.openfoam.com/ ]this[/url], but he reckons you could get a reasonable estimate with hand calcs.
If you can't estimate it with hand calcs any simulation you do will just be pissing in the wind. 😆
Is it worth claiming?
a 20m roll of heavy duty green mineral felt is only £40
Dbcooper - Just looked and that is Linux only. I guess the calcs to do it properly would be pretty complex
Jota180 - A large area of of it is flat roof, so would need doing properly to avoid leaks - think it is probably around 25m^2
Strangely, just had a lunchtime CPD with a wind Micro-Climate engineer.
They use CFD to provide comfort level windspeeds for use in building design decisions for urban realm effects, but for negative pressure values use a model in a wind tunnel, otherwise they'd end up taking too much time to run the calcs as unlike my SO they don't have a Cray CS400 to use...
Winterwatch OMG
Its turned into Top Gear with Squirrels