How does friction loss in a hose relate to the velocity flow?

Friction loss in a hose is determined by the velocity of the fluid flowing through it. The relationship indicates that as the velocity of the fluid increases, the friction loss increases exponentially, specifically proportional to the square of the velocity.

When fluid flows through a hose, it encounters resistance due to the internal surface roughness and the interactions between the fluid particles. This resistance causes energy loss in the form of friction loss, which is more pronounced at higher velocities. Thus, when assessing friction loss, if you were to double the flow velocity, the friction loss would increase by a factor of four (since it relates to the square of the velocity).

This understanding helps in designing firefighting operations and efficient hose line deployments, ensuring that the flow rate is effectively managed to minimize pressure loss and maximize performance. As a result, this relationship is critical for operators to consider when making decisions about equipment and flow management.