Bagley End Correction Viscometer Calculator
Capillary rheometry & polymer testing: Eliminate entrance and exit convergent flow pressure losses using the Bagley plot method, calculating the end correction factor ($e$), true wall shear stress ($\tau_w$), and Rabinowitsch-corrected viscosity.
Capillary Die Test Pressures
γ̇_app = 4Q / (π R³)
L₂/R = 0 for zero-length orifice die
Weissenberg-Rabinowitsch Index
n' = 1.0 for Newtonian fluid
True Rheological Properties Output
True Wall Stress τ_w:
--
kPa (fully developed shear)
True Viscosity η_true:
--
Pa · s (Bagley + WR corrected)
Bagley Factor e:
--
equivalent L/R length
Entrance Loss ΔP_end:
--
bar (extensional loss)
True Shear Rate:
--
s⁻¹ (Rabinowitsch)
Capillary Error Comparison
Uncorrected Apparent Viscosity (Die 1):
--
Viscosity Overestimation Without Correction:
--
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