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Head Loss
Head Loss is a core engineering term. Definition, usage notes, and a practical example.
Definition
Head loss is the energy lost to friction and local resistances during flow.
Why it matters
It is essential for pump selection, energy use, and process stability.
How it is used
In a design check, first define the relevant load, dimension, material, or flow condition. Then interpret this term by its role in the formula and compare it with limits.
Darcy loss = friction factor x length / diameter x velocity head
Example
Long pipe, small diameter, and many elbows increase head loss.
Related calculators and resources
Formulas
Darcy loss = friction factor x length / diameter x velocity head