10 mm bore
- Reynolds number
- 10,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 10 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
VALICALC · TECHNICAL REFERENCE
Pipe Reynolds Number Reference
Compare Reynolds number across authored pipe bore scenarios at your velocity and kinematic viscosity. Flag the uncertain transition region before using friction.
ValiCalc · Pipe Reynolds Number Reference
https://www.valicalc.com/reynolds-number-reference
Dataset v1.3.0 · verified 2026-10-07
Display: metric. Mean liquid velocity: 1 m/s · Kinematic viscosity: 1 cSt
SCENARIO MATRIX
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
SELECTED REFERENCE
10 mm bore
- Reynolds number
- 10,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 10 mm
All fields & cell provenance
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
- Inside-diameter scenario: Reynolds number similarity definition — Authored Re=vD/ν scenario; classification convention disclosed · verified 2026-10-07 · source value 10 mm bore.
- Reynolds number: Reynolds number similarity definition — Authored Re=vD/ν scenario; classification convention disclosed · verified 2026-10-07.
- Illustrative pipe regime: Reynolds number similarity definition — Authored Re=vD/ν scenario; classification convention disclosed · verified 2026-10-07 · source value Turbulent scenario.
- Inside diameter: Reynolds number similarity definition — Authored Re=vD/ν scenario; classification convention disclosed · verified 2026-10-07.
- Entered mean velocity: Reynolds number similarity definition — Authored Re=vD/ν scenario; classification convention disclosed · verified 2026-10-07.
- Entered kinematic viscosity: Reynolds number similarity definition — Authored Re=vD/ν scenario; classification convention disclosed · verified 2026-10-07.
v1.3.0 · verified 2026-10-07 · values use the valid conditions shown above
10 mm bore10,000 ReBack to answer ↑
Explore the verified data
10 matching rows · 10 in this subset
| Inside-diameter scenario | Reynolds number | Illustrative pipe regime | Inside diameter | Actions |
|---|---|---|---|---|
| 10 mm bore | 10,000 Re | Turbulent scenario | 10 mm | |
| 15 mm bore | 15,000 Re | Turbulent scenario | 15 mm | |
| 20 mm bore | 20,000 Re | Turbulent scenario | 20 mm | |
| 25 mm bore | 25,000 Re | Turbulent scenario | 25 mm | |
| 32 mm bore | 32,000 Re | Turbulent scenario | 32 mm | |
| 40 mm bore | 40,000 Re | Turbulent scenario | 40 mm | |
| 50 mm bore | 50,000 Re | Turbulent scenario | 50 mm | |
| 75 mm bore | 75,000 Re | Turbulent scenario | 75 mm | |
| 100 mm bore | 100,000 Re | Turbulent scenario | 100 mm | |
| 150 mm bore | 150,000 Re | Turbulent scenario | 150 mm |
15 mm bore
- Reynolds number
- 15,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 15 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
20 mm bore
- Reynolds number
- 20,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 20 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
25 mm bore
- Reynolds number
- 25,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 25 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
32 mm bore
- Reynolds number
- 32,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 32 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
40 mm bore
- Reynolds number
- 40,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 40 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
50 mm bore
- Reynolds number
- 50,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 50 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
75 mm bore
- Reynolds number
- 75,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 75 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
100 mm bore
- Reynolds number
- 100,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 100 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
150 mm bore
- Reynolds number
- 150,000 Re
- Illustrative pipe regime
- Turbulent scenario
- Inside diameter
- 150 mm
More dimensions
- Entered mean velocity
- 1 m/s
- Entered kinematic viscosity
- 1 cSt
How to use this data
Re=v[m/s]D[m]/ν[m²/s];1 cSt = 10^-6 m²/s. Bore is actual inside diameter. Threshold labels match the disclosed existing pipe solver convention.
CHECK THE METHOD
Worked example
50 mm, 1 m/s and 1 cSt give Re 50000. At velocity 0.05 m/s the same bore gives Re 2500, flagged as uncertain transition.
Related calculators
Continue the reference workflow
Common lookup questions
What should I confirm before using this lookup?
Disturbance, entry length, roughness and geometry affect transition. The label is a planning convention for pipe flow, not a universal fluid-dynamics answer or measured regime.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.3.0
Last verified:
Ten authored bores. Labels use the existing Pump TDH convention: below 2300, 2300–4000 uncertain transition, above 4000. These are not universal transition thresholds.
Values are curated product facts or generated scenarios. Paid standards, complete catalogs and source diagrams are not reproduced. A verification date applies to this documented subset.
Reynolds number similarity definition ↗
Type A · NASA Glenn · Educational Reynolds number definition; checked 2026-10-07
Original equations, chosen scenarios and generated values; no copied tables or drawings.
Full provenance & artifact record
- Source checked
- 2026-10-07
- Use basis
- authored-formula
- Artifact SHA-256
- No retained source artifact hash; see the stated source and verification record.