🎯 External Flow — Drag Force Calculator
Calculate drag force on common geometries with Reynolds-dependent drag coefficient correlations.
📝 Configuration
Drag Force:
F_D = C_d × (ρU²/2) × A_ref
Sphere:
Stokes (Re<1): C_d = 24/Re
Intermediate: C_d = 24/Re(1+0.15Re^0.687)
Newton: C_d ≈ 0.44
Cylinder: C_d ≈ 1.2 (Re > 10³)
Flat plate: C_d ≈ 1.17 (normal)
F_D = C_d × (ρU²/2) × A_ref
Sphere:
Stokes (Re<1): C_d = 24/Re
Intermediate: C_d = 24/Re(1+0.15Re^0.687)
Newton: C_d ≈ 0.44
Cylinder: C_d ≈ 1.2 (Re > 10³)
Flat plate: C_d ≈ 1.17 (normal)
📊 Results & Visualization
Configure the inputs and click Calculate to see results.
ℹ️ About External Flow Drag
Drag is the resistance force exerted on a body moving through a fluid. It depends on shape, velocity, and fluid properties.
Applications:
• Automotive aerodynamics
• Settling velocity of particles
• Wind loading on structures
• Projectile ballistics
• Parachute design
Drag is the resistance force exerted on a body moving through a fluid. It depends on shape, velocity, and fluid properties.
Applications:
• Automotive aerodynamics
• Settling velocity of particles
• Wind loading on structures
• Projectile ballistics
• Parachute design