[esp-r] boundary node pressure calculation

[Dimitrios Sfakianakis]

Dear list,

I have set up a flow network and one of my nodes is a boundary wind induced node with the '1:1 sheltered roof <10deg' pressure coefficient set and the wind reduction factor is set to '1'.

I notice that when I change the reference height of this node, its pressure changes as well. I read in the literature (Clarke,2001 and Hensen Phd Thesis,1991) that the boundary wind induced node pressure is a function of the pressure coefficient set, density,  the wind direction and reference wind speed. The reference wind speed is calculated as a function of the free stream wind speed (the one read from the climate file), the height difference and the local terrain roughness. However as I have seen in the flow network menu, the reference wind speed is calculated only if the user assigns a wind profile (power law, logarithmic,  LBL). My question is:

-If the wind reduction factor is set to '1' should the reference height of the boundary wind induced node affect its pressure?

Kind regards,

-

Dimitrios Sfakianakis MEng


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