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Table 4 Derivatives of four texture equations

From: Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Texture Chevron texture Composite texture Groove texture Circular texture
Equation F'(x) = 2·K1·x + K2 F'(x) = 2·K1·x + K2 F'(x) = 2·K1·x + K2 F'(x) = 2·K1·x + K2
K1 − 9.52 − 6.904 − 6.904 − 15.90
K2 8.377 6.942 6.942 16.06