TY - JOUR
T1 - Challenges of numerical simulation of dynamic wetting phenomena
T2 - a review
AU - Afkhami, Shahriar
N1 - Funding Information:
The author acknowledges the support by the Petroleum Research Fund PRF-59641-ND. The author thanks P. Lehrer for help with Basilisk computations, K. Mahady, for fluid–fluid–solid interaction simulations, and S. Zaleski for fruitful discussions and help with improving this review.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/2
Y1 - 2022/2
N2 - Wetting is fundamental to many technological applications that involve the motion of the fluid–fluid interface on a solid. While static wetting is well-understood in the context of thermodynamic equilibrium, dynamic wetting is more complicated in that liquid interaction with a solid phase, possibly on molecular scales, can strongly influence the macroscopic scale dynamics. The problem with continuum models of wetting phenomena then is that they ought to be augmented with microscopic models to describe the molecular neighborhood of the moving contact line. In this review, widely used models for the computation of wetting flows are summarized first, followed by an overview of direct numerical simulations based on the volume-of-fluid approach. Recent developments in the volume-of-fluid simulations of the wetting are then reviewed, with particular attention paid to combine macro-scale simulations with the hydrodynamic theory near the moving contact line, as well as including a microscopic description by coupling with the van der Waals interface model. Finally, the extension to modeling the contact line motion on non-flat surfaces is surveyed, followed by hot topics in nucleate boiling.
AB - Wetting is fundamental to many technological applications that involve the motion of the fluid–fluid interface on a solid. While static wetting is well-understood in the context of thermodynamic equilibrium, dynamic wetting is more complicated in that liquid interaction with a solid phase, possibly on molecular scales, can strongly influence the macroscopic scale dynamics. The problem with continuum models of wetting phenomena then is that they ought to be augmented with microscopic models to describe the molecular neighborhood of the moving contact line. In this review, widely used models for the computation of wetting flows are summarized first, followed by an overview of direct numerical simulations based on the volume-of-fluid approach. Recent developments in the volume-of-fluid simulations of the wetting are then reviewed, with particular attention paid to combine macro-scale simulations with the hydrodynamic theory near the moving contact line, as well as including a microscopic description by coupling with the van der Waals interface model. Finally, the extension to modeling the contact line motion on non-flat surfaces is surveyed, followed by hot topics in nucleate boiling.
KW - Dynamic contact line
KW - Nucleate boiling
KW - Numerical simulations
KW - Porous media
KW - Volume-of-fluid method
KW - Wetting/Dewetting
KW - van der Waals interaction
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U2 - 10.1016/j.cocis.2021.101523
DO - 10.1016/j.cocis.2021.101523
M3 - Review article
AN - SCOPUS:85120403830
SN - 1359-0294
VL - 57
JO - Current Opinion in Colloid and Interface Science
JF - Current Opinion in Colloid and Interface Science
M1 - 101523
ER -