Wavy-sinusoidal surfaces

Comparisons in this part are made on sinusoidal surfaces with transverse, longitudinal, and isotropic patterns. Geometric shapes for the three types of waviness are specified by Eqs (41)-(43). Amplitude of waviness, A, is set at 0.4 /am for transverse and longitudinal waviness but adjusted to 0.2 mm for the isotropic one, while the wavelength is = Wy... 

Considerable numbers of the numerical solutions of full-Hlm EHL for different surface geometries, such as the smooth surfaces, surfaces with single asperity, and sinusoidal waviness, were published over the past years. They provide good reference data for the purpose of model validation. 

FIGURE 9.6. Ideal solid surface with a sinusoidal profile. For low amplitudes, the liquid is able to follow the waviness. Beyond a certain amplitude threshold, air pockets can form underneath the liquid. 

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