Ricerc@Sapienza

The exact regularised point particle (ERPP) method is extended to treat the inter-phase momentum coupling between particles and fluid in the presence of walls by accounting for vorticity generation due to particles close to solid boundaries. The ERPP method overcomes the limitations of other methods by allowing the simulation of an extensive parameter space (Stokes number, mass loading, particle-to-fluid density ratio and Reynolds number) and of particle spatial distributions that are uneven (few particles per computational cell).

Buoyancy-driven convention from a pair of horizontal heated cylinders, set side by side
inside a square cooled cavity filled with water, is studied numerically. The system of the
conservation equations of mass, momentum and energy expressed in dimensionless form is
solved through a control-volume formulation of the finite-difference method. The pressurevelocity
coupling is handled using the SIMPLE-C algorithm. Numerical simulations are executed
for different values of the Rayleigh number based on the cylinder diameter, as well as

In this paper, numerical investigation of two-dimensional conjugate heat transfer of laminar wall jet flow over a shallow cavity heated from the bottom of the solid wall is carried out. The flow and conjugate heat transfer behaviors, isotherm contour in the cavity region, isotherm contour on the solid, interface temperature, local Nusselt number (local Nu), and average Nusselt number (average Nu) are investigated for various parameters, viz., Re, AR, Xu, and b. The momentum of the fluid is gradually reduced when the step length Xu is increased.

The flow and heat transfer behavior of laminar incompressible slot jets impingement cooling of an array of heated surfaces in a channel have been investigated numerically. The computations are done for a variety of values of slot jets Reynolds number, channel height and distance between two heated blocks. The influences of these geometrical and physical parameters are predicted. The results, streamline contour, velocity profile, isothermal contour, local Nusselt number, and average Nusselt number are compared and documented.