Mesoscopic modeling of slip motion at fluid-solid interfaces with heterogeneous catalysis

Area of Science:

• Fluid dynamics
• Surface science
• Chemical engineering

Background:

• Understanding fluid behavior at interfaces is crucial for microscale devices.
• Wall properties significantly influence flow dynamics, especially in confined geometries.
• Catalytic microchannels rely on efficient fluid-wall interactions for optimal performance.

Purpose of the Study:

• To investigate the onset of slip motion at fluid-solid boundaries.
• To determine the relationship between slip flow and solid wall reflectivity.
• To assess the impact of slip flow on catalytic microchannel conversion efficiency.

Main Methods:

• Utilized a mesoscopic lattice Boltzmann model.
• Simulated fluid flow across solid boundaries with varying reflectivity.
• Analyzed slip velocity as a function of wall reflectivity.

Main Results:

• Observed substantial slip flow for wall reflectivity values below a critical threshold.
• Quantified the onset of slip motion as a function of wall reflectivity.
• Demonstrated a significant effect of slip flow on catalytic microchannel conversion efficiency.

Conclusions:

• Wall reflectivity is a key parameter governing slip motion at fluid-solid interfaces.
• Slip flow significantly influences the performance of catalytic microchannels.
• The lattice Boltzmann model provides a robust framework for studying interfacial slip phenomena.