Unsteady micropolar nanofluid flow past a variable riga stretchable surface with variable thermal conductivity.

Area of Science:

• Fluid Dynamics
• Heat and Mass Transfer
• Nanofluids

Background:

• Micropolar fluids exhibit unique microstructural properties.
• Riga plates generate electromagnetic forces crucial for fluid control.
• Understanding heat and mass transfer is vital in many industrial processes.

Purpose of the Study:

• To investigate the flow of a micropolar fluid over a vertical Riga sheet with a non-linear stretching surface.
• To analyze the effects of variable thermal conductivity, radiation, Brownian motion, and thermophoresis.
• To explore the influence of these parameters on fluid dynamics and heat/mass transfer characteristics.

Main Methods:

• Mathematical modeling of the fluid flow using partial differential equations.
• Transformation of PDEs into ODEs via similarity variables.
• Numerical solution of the ODEs using the bvp4c function.

Main Results:

• The micropolar parameter positively influences surface friction and couple stress.
• Variable thermal conductivity enhances heat transfer while reducing mass transfer.
• Graphical and tabular data illustrate the impact of various parameters on velocity, microrotation, temperature, and concentration.

Conclusions:

• The study provides insights into controlling heat and mass transfer in micropolar fluid flows over Riga sheets.
• Findings are relevant for applications involving electromagnetic effects and microfluidics.
• The interplay between fluid properties and external parameters is crucial for optimizing thermal-electric systems.