Two-phase simulations of viscoplastic flow in superhydrophobic microchannels: interface stability, plug dynamics, and drag reduction

Key Points

• The aim is to explore how viscoplastic flow behaves in superhydrophobic microchannels to enhance design for microfluidic applications.
• Performed two-phase simulations of viscoplastic flow.
• Analyzed interface behaviors including pinning, depinning, and breakage.
• Examined the influence of inertia, capillarity, and yield stress.
• Discovered different flow regimes affecting interface stability.
• Identified conditions under which plug dynamics optimize drag reduction.
• Developed a predictive design map for lab-on-a-chip devices.