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Hello,
I have some confusion of how the built in formula generated in simulation studio (when automatically created from 3D sketchup file) calculates the new wind direction considering some "Turn" angles in building.
The formula that is by default created in wizard is- MOD(Input1+TURN/HEMISPHERE,360) + LT(Input1+TURN/HEMISPHERE,0)*(360) ! wind direction corrected by scene rotation angle (0...360 deg) where input 1 is the wind direction.
Now this wind direction is mentioned as the direction from which wind is blowing where N=0, E=90, S=180 and W=270 or -90.
The turn is considering N to E as positive.
Considering the above mentioned formula the new wind direction is calculated 60 for a house that is located in northern hemisphere at a turn of 60.
My question is how this is 60 degree. If wind direction is 30 degree that means wind direction is from 30 degree clockwards of North. Turn of building is also 30 degrees clockward of North per convention. Then the direction from which the wind is blowing and the building's North face is essentially in the same direction.
Really appreciate some clarification.
-Abir
DavidBradley 10/10/2023 1:44 pm
@tm-abir-ahsan
you bring up a good point! This is one on which I want to check with some colleagues before answering. Please stand by!
TM Abir Ahsan Topic starter
10/10/2023 3:11 pm
@DavidBradley
Thanks David, for looking into this. My building structure's external convection coefficient rely on the accurate estimation of wind speed and wind direction. I want to be sure that I am calculating the wind direction properly.
