Journal bearing — oil flow / pressure drop
Pressure drop across a journal bearing film needed to produce a prescribed axial (cooling) flow rate, from shaft diameter, bearing length, radial clearance, eccentricity and viscosity.
Dimensionless length, L/d1
Dimensionless clearance, ΔR/R0.01
Minimum film thickness, h₀0.2 mm
Pressure difference over the bearing length, Δp0.27
Method & references
- Oil flow through a journal bearing — pressure drop for a prescribed axial (cooling) flow rate.
The computation is a literal port of the original client-side JavaScript from /calculators/filmflow.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.