volumetric flow rate
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When the volumetric flow rate is constant, the flow velocity is inversely proportional to the pipe diameter – is this correct?
Formula: Volumetric flow rate (Q) = Average flow velocity (v) × Cross-sectional area of the pipe (A)
In plain terms, it’s correct. In fact, it is in inverse mathematical proportion to the square of the pipe diameter.
Flow rate = flow velocity × cross-sectional area, and is inversely proportional to the square of the pipe diameter
For incompressible gases and liquids, the flow velocity is inversely proportional to the square of the pipe diameter.
You are all correct; strictly speaking, when the volumetric flow rate is constant, the flow velocity is inversely proportional to the square of the pipe diameter.