Diameter from Flow

Required inside diameter for a target mean velocity. Does not pick a commercial size.

App id: FLUID-03. Reference version 1.0.

How to fill it

Fill the inputs. The tool shows the outputs.

On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.

Formula

D = √(4Q / (π v))

Inputs

Name	Unit
Volumetric flow	`m3/s`
Target velocity	`m/s`

Outputs

Name	Unit
Required inside diameter (hero result)	`mm`
Flow area	`m2`

Diagnose

Observations are context. They do not pass or fail a structure. See Diagnose.

When	Observation	Severity
`Target velocity < 0.3`	Low velocity	info
`Target velocity > 5`	High velocity	caution
`Target velocity > 3`	Elevated velocity	info

Assumptions

Target velocity is the mean. Result is internal diameter, not a catalog pipe size.

Provenance

Continuity for a full circular pipe.