Double-diffusive convection from an oscillating baffle embedded in an astroid-shaped cavity suspended by nano encapsulated phage change materials: ISPH simulations

Abstract

The incompressible smoothed particle hydrodynamics is applied to simulate the suspension of the nano-encapsulated phase change materials (NEPCMs) within an astroid-shaped cavity. The astroid signifies a geophysical frontier of scientific significance in a mechanical profile of the solar system’s origin. Hence, a novel geometry of an astroid shape is conducted in this work. An embedded baffle inside an astroid-shaped cavity is oscillating by an excitation motion . The oscillating motion of a baffle and double-diffusive convection inside an astroid-shaped cavity are handled by the ISPH method. The astroid-shaped cavity has low temperature and concentration in the bottom walls while the top walls are adiabatic. The numerical simulations clarified that an amplitude parameter of the oscillation motion varies the phase change zone and features of heat and mass transport inside an astroid-shaped cavity. The Stefan and fusion parameters are acting effectively in enhancing a phase change zone. The expanded baffle is utilizing to enhance the convective heat and mass transport and a phase change zone. The superior values of the average Nusselt and Sherwood numbers are obtained when the inner baffle is expanded due to higher buoyancy forces.