// multi-utility computation suite · offline · instant · precise
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eng.stribeck-friction-regimes Calculator
Calculates the Stribeck curve friction coefficient and identifies the lubrication regime (boundary, mixed, or hydrodynamic) from viscosity, speed, and pressure. The Stribeck curve shows friction coefficient dropping through the mixed lubrication regime — below a critical speed, boundary lubrication causes wear.
Inputs
Dynamic Viscosity Pa S
Fluid resistance to flow. Water at 20°C: ~1 cP. Honey: 2,000–10,000 cP. Higher viscosity increases pumping power requirements.
Sliding Speed M S
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Normal Load N
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
Surface Roughness Um
Reference formula or conversion factor shown for context.
Results
lubrication regime
The operating regime — the mode or zone in which the system is currently operating.
lambda ratio Λ
The proportional relationship between two quantities.