This paper studies the two-dimensional water-entry and sedimentation of an elliptic cylinder using the subparticle scale (SPS) turbulence model of a Lagrangian particle-based smoothed-particle hydrodynamics (SPH) method. The motion of the body is driven by the hydrodynamic forces and the gravity. The present study shows the ability of the SPH method for the simulation of free-surface-involving and multiphase flow problems. The full Navier–Stokes equation, along with the continuity equation, have been solved as the governing equations of the problem. The accuracy of the numerical code is verified using the case of the water-entry and exit of a circular cylinder. The numerical simulations of the water-entry and sedimentation of the vertical and horizontal elliptic cylinder with the diameter ratio of 0.75 are performed at the Froude numbers of 0, 2, 5, and 8, and the specific gravities of 0.5, 0.75, 1, 1.5, 1.75, 2, and 2.5. The effect of the governing parameters and vortex shedding behind the elliptic cylinder on the trajectory curves, velocity components within the flow field, rotation angle, the velocity of ellipse, and the deformation of free-surface have been investigated in detail.

The novelties of this work are thermal management in the triangular and cubical concentrator collectors along with turbulent water, oil, ethylene glycol, and glycerin. Present learn about optimized and multiplied the efficiency of attention solar parabolic collector. Three-dimensional computational fluid dynamics (CFD) simulations are performed using FLUENT software to study fluid flow, turbulence, heat transfer, and thermal energy consumption on the nanoparticles water, ethylene glycol, oil, and glycerin sides for various solar panel configurations. CFD Performance Analysis is performed under turbulent flow conditions for circular and octagonal collector configurations. The fluid drift is turbulent, incompressible, steady, and totally developed. The collectors with triangular and cubical move areas have been investigated with water, oil, ethylene glycol, and glycerin fluids. The top half of these go sections is a collector and the lower half is insulated. According to the result, enthalpy performance of the triangular collector using oil, ethylene glycol, and glycerin developed 12%, 26%, and 30%, respectively. Also, total surface heat flux for a cubical collector using ethylene glycol, water, oil, and glycerin increased 25.2%, 41%, 5.9%, and 26.6%, respectively, more than triangular collector. Moreover, surface incident radiation in triangular collector for ethylene glycol, water, oil, and glycerin were 64%, 1.4%, 12.2%, and 7.4%, respectively, more than cubical collector. In addition, radiation heat flux of triangular collector for ethylene glycol, water, oil, and glycerin developed 76%, 8.5%, 85%, and 82%, respectively, more than cubical collector. Finally, performance efficiency of water in cubical collector, oil in triangular, ethylene glycol, and glycerin increased 16%, 11.1%, 11.8%, and 4%, respectively, more than cubical collector.