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Viscosity
Viscosity is a core engineering term. Definition, usage notes, and a practical example.
Definition
Viscosity is the internal resistance of a fluid to flow.
Why it matters
It affects pump power, pressure loss, lubrication film, and temperature behavior.
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.
Example
Cold oil has higher viscosity and can increase starting torque.
Related calculators and resources
Formulas
No formulas added for this term.