Wind Velocity

1 2 1 2 kg m3 35 m s 2 10 m2 7350 n.

Wind velocity. Wind speed affects weather forecasting aviation and maritime operations construction projects growth and metabolism rate of many plant species and has countless other implications. Vb cdir cseason vb 0 the directional factor cdir takes into account the directional variation of the wind intensity. Altitude correction may also be specified in the national annex for en1991 1 4 4 2 2 p. A hurricane acting on a 10 m2 wall creates a force equal to the weight of aprox.

Simply enter in a location street address longitude latitude zip code and the software will give you the corresponding wind speed by location as per the design standard. The basic wind velocity is given as vb vb 0 cdir cseason where the fundamental value of basic wind velocity vb 0 is defined in en1991 1 4 4 2 1 p and its value is provided in the national annex. Within the beaufort scale gale force winds lie between 28 knots 52 km h and 55 knots 102 km h with preceding adjectives such as moderate fresh strong and whole used to differentiate the wind s strength within the gale category. Values from tables vi and vii can be linearly scaled and multiplied by the applicable values of i and kzt to get the actual wind pressure in lb ft2.

Wind speed calculator the first step of the software is to pull the wind speed out of the design code based on the user input location or zip code. The horizontal direction and speed of air motion. Note that wind direction is usually almost parallel to isobars due to earth s rotation. Fw 1 2 ρ v2 a.

The total load on the wall can be calculated as. Or from the table above the wind load per square metre is 735 n m2. 735 n m2 10 m2 7350 n. A storm has winds of 56 knots 104 km h to 63 knots 117 km h.

The maximum wind velocity of the white oval increased from 120 meters per second 270 miles per hour in 1979 to more than 180 meters per second today. To obtain the values of qh or qz corresponding to exposure c or d select wind velocity v from table i for respective site location enter this v value in table vi or vii for exposure d and select qz or qh at the the desired height z or h. The basic wind velocity vb is defined in en1991 1 4 4 2 2 p as a function of the wind direction and time of year at 10 m above ground. It is calculated as.

Little red spot winds strengthen this model also known as the snl sandia national laboratories model uses ambient temperature t sub a global solar irradiance g and wind velocity v sub w as inputs to calculate pv module temperature t sub pv.