Fluid contact angle on solid surfaces: Role of multiscale surface roughness

• DOI: 10.1063/1.4932104
• Publication Date: 2015-10-06T17:00:31Z
• Authors: F. Bottiglione; G. Carbone; B. N. J. Persson
• Keywords: Solid surface

We present a simple analytical model and an exact numerical study which explain the role of roughness on different length scales for fluid contact angle rough solid surfaces. show that there is no relation between distribution surface slopes angle. In particular, surfaces with same may exhibit very angles depending range length-scales over have roughness.