Effect of sinusoidal heated blocks on electroosmotic flow mixing in a microchannel with modified topology

The present study is focused on micromixing enhancement techniques for electroosmotic flows in a modulated microchannel with modified topology by utilizing heated blocks the surface of microchannel. carry higher temperatures as compared to other portions channel wall, resulting sharp variation temperature fluid. species transport governed Nernst–Planck equation form adding thermo-electrochemical migration term due ions, justifying electrochemical equilibrium conditions. fluid considered non-Newtonian and power-law model. Navier–Stokes equations, along thermal energy equation, are simulated numerically coupled finite volume-based semi-implicit method pressure-linked algorithm interpret behavior electric potential distribution, external field, flow concentration, which major contributors mixing efficiency. results varied analytical simple microchannel, indicating that efficiency can be enhanced increasing blocks. Due migration, ions redistributed blocks, oscillating velocity creating vortices, enhancement. effects geometrical parameters, Debye–Hückel parameter, gradient, index, Nusselt number elaborated effective rate micromixing. found optimum gradients indices. net throughput analysis combines modulation wall will aid improving design fabrication microfluidic mixers.