Hybrid nanofluid flow around a triangular-shaped obstacle inside a split lid-driven trapezoidal cavity

Numerical simulation analyzes the mixed convection flow of $$\hbox {Al}_{2}\hbox {O}_{3}{-}\hbox {Cu}{-}\hbox {H}_{2}\hbox {O}$$ (aluminium oxide–copper–water) hybrid nanofluid inside a split lid-driven trapezoidal cavity. A triangular-shaped cold obstacle is placed The horizontal base cavity kept cold, whereas side walls are chosen adiabatic. thermally active upper wall maintained at constant temperature into halves, and each half moves opposite to other with velocity. Modeled equations converted nonlinear system partial differential equations. This system, along incorporated physical boundary constraints, solved numerically via Galerkin finite-element method. Attained results also compared earlier publications ensure validation accuracy. To examine effects various pertinent parameters, heat transfer attributes like dimensionless velocity, stream contours, temperature, isotherms, local average Nusselt numbers critically analyzed. outcomes this examination will provide qualitative suggestions improve cooling mechanism several electronic gadgets thermal devices.