In the Net Discharge Head equation Hd = hd + hv + hp + hf, which term is the friction head?

In the Net Discharge Head equation Hd = hd + hv + hp + hf, which term is the friction head?

• A. hd
• B. hv
• C. hp
• D. hf

Answer: (D)

Friction head represents the losses due to friction along the pipe and fittings. In the head balance for flow, total discharge head is made up of different energy components: a portion related to elevation (static head), a portion due to the fluid’s velocity (velocity head), a portion due to pressure (pressure head), and a portion that accounts for losses from friction (friction head). The term that specifically accounts for those friction losses is the one associated with hf. The other terms correspond to elevation-related head, kinetic energy from motion, and pressure energy, respectively. Friction head increases with longer pipes, rougher surfaces, and higher flow rate, and it’s computed from models like Darcy–Weisbach.

Friction head represents the losses due to friction along the pipe and fittings. In the head balance for flow, total discharge head is made up of different energy components: a portion related to elevation (static head), a portion due to the fluid’s velocity (velocity head), a portion due to pressure (pressure head), and a portion that accounts for losses from friction (friction head). The term that specifically accounts for those friction losses is the one associated with hf. The other terms correspond to elevation-related head, kinetic energy from motion, and pressure energy, respectively. Friction head increases with longer pipes, rougher surfaces, and higher flow rate, and it’s computed from models like Darcy–Weisbach.