Drag coefficient
Reference data et engineering information about drag coefficient pour fluid mechanics applications.
dragcoefficientCalculatrice
Overview
The drag coefficient () is a dimensionless number quantifying the drag or resistance of an object in a fluid environment. It depends on the object's shape, orientation, and surface roughness.
Data Table
10 lignes
Shape | Drag Coefficient (C_D) | Reynolds Number Range | Reference Area |
|---|---|---|---|
| Sphere | 0.47 | > 1000 | Frontal |
| Half-sphere | 0.42 | > 1000 | Frontal |
| Cube | 1.05 | > 10000 | Frontal |
| Long cylinder (perpendicular) | 1.2 | > 10000 | Frontal |
| Flat plate (perpendicular) | 1.98 | > 10000 | Frontal |
| Streamlined body | 0.04 | > 100000 | Frontal |
| Airfoil (at best L/D) | 0.007 | > 100000 | Planform |
| Automobile | 0.25 | — | Frontal |
| Sphere (smooth, Re=10⁵) | 0.1 | ~100000 | Frontal |
| Disk | 1.17 | > 10000 | Frontal |
Source: engineeringtoolbox.com
Notes
- Values are at standard conditions unless otherwise noted
- Always verify values for critical applications