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Numerical investigation of boundary conditions for moving contact line problems
Chemical Engineering Faculty Publications
  • Sandesh Somalinga, University of Rhode Island
  • Arijit Bose, University of Rhode Island
Document Type
Date of Original Version
When boundary conditions arising from the usual hydrodynamic assumptions are applied, analyses of dynamic wetting processes lead to a well-known nonintegrable stress singularity at the dynamic contact line, necessitating new ways to model this problem. In this paper, numerical simulations for a set of representative problems are used to explore the possibility of providing material boundary conditions for predictive models of inertialess moving contact line processes. The calculations reveal that up to Capillary number Ca=0.15, the velocity along an arc of radius 10Li (Li is an inner, microscopic length scale)from the dynamic contact line is independent of the macroscopic length scale a for a>103Li , and compares well to the leading order analytical ‘‘modulated-wedge’’ flow field [R. G. Cox, J. Fluid Mech. 168, 169 (1986)] for Capillary number Ca168, 169 (1986)] is used as a boundary condition along an arc of radius R =10-2a from the dynamic contact line, agree well with those using two inner slip models for Ca2000 American Institute of Physics.@ [S1070-6631~00!00402-5]
Publisher Statement

© 2000 American Institute of Physics. @ [S1070-6631~00!00402-5]

Citation Information

Somalinga Sandesh and Arijit Bose. ʺNumerical Investigation of Boundary Conditions for Moving Contact Line Problems.ʺ Physics of Fluids. 12(3):499-510. March 2000.