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Table 1 Simulation equations of four textures

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

Texture Chevron texture Composite texture Groove texture Circular texture
Equation f(x) = P1·x2 + P2·x+ P3 f(x) = P1·x2 + P2·x+ P3 f(x) = P1·x2 + P2·x+ P3 f(x) = P1·x2 + P2·x+ P3
P1 − 9.52 − 5.146 − 6.904 − 15.90
P2 8.377 6.462 6.942 16.06
P3 1.791 0.7071 − 0.2811 − 0.2623
R-square 0.946 0.912 0.8769 0.8741