Blowing Force Calculator

Blowing Force Calculator:

Enter the values of air density, Da_(kg/m3) , area, A_(m2) and velocity, V_(m/s) to determine the value of Blowing Force, BF_(N).

Enter Air Density :		kg/m3
Enter Cross-Sectional Area :		m2
Enter Velocity :		m/s
Result – Blowing Force :		N

Blowing Force Formula:

The blowing force refers to the force exerted by a moving fluid or gas on a surface perpendicular to its flow direction.

Force, BF_(N) in Newtons is calculated by multiplying the air density, Da_(kg/m3)  in kilogram per cubic metres, the cross-sectional area, A_(m2) in metre square and the square of the velocity, V_(m/s) in metres per second.

Blowing Force, BF_(N) = Da_(kg/m3) * A_(m2) * V²_(m/s)

BF_(N) = blowing force in Newtons, N.

Da_(kg/m3) = air density in kilogram per cubic metres, kg/m³.

A_(m2) = cross-sectional area in metre square, m².

V_(m/s) = velocity in metres per second, m/s.

Blowing Force Calculation:

1.Calculate the blowing force of wind against a building window:

Given: Da_(kg/m3)= 1.225 kg/m³, A_(m2)= 2m², V_(m/s) = 15 m/s.

Blowing Force, BF_(N) = Da_(kg/m3) * A_(m2) * V²_(m/s)

BF_(N) = 1.225 * 2 * 15²

BF_(N) = 551.25N.

2.To find the cross-sectional area, A_(m2):

Given: Da_(kg/m3)= 1.2kg/m³, BF_(N) = 600N, V_(m/s) = 20 m/s.

Blowing Force, BF_(N) = Da_(kg/m3) * A_(m2) * V²_(m/s)

A_(m2) = BF_(N) / Da_(kg/m3) * V²_(m/s)

A_(m2) = 600 / 1.2 * 20²

A_(m2) = 1.25m².