FieldengFluid & Pressure
Flow from Velocity
Volumetric flow from mean velocity in a full circular pipe.
Volumetric flow from mean velocity in a full circular pipe.
App id: FLUID-01. 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
Q = v π D² / 4Inputs
| Name | Unit |
|---|---|
| Mean velocity (camera) | m/s |
| Inside diameter | mm |
Outputs
| Name | Unit |
|---|---|
| Volumetric flow (hero result) | m3/s |
| Flow area | m2 |
Diagnose
Observations are context. They do not pass or fail a structure. See Diagnose.
| When | Observation | Severity |
|---|---|---|
Mean velocity < 0.3 | Low velocity | info |
Mean velocity > 5 | High velocity | caution |
Mean velocity > 3 | Elevated velocity | info |
Assumptions
- Circular, full pipe. Velocity is the mean across the section.
Provenance
- Continuity for incompressible flow in a full circular pipe.