Numerical analysis of laminar flow and heat transfer through a rectangular channel containing perforated plate at different angles

Abstract

We intend to investigate numerically non-isothermal fluid flowing through a rectangular channel containing a perforated plate called screen with fixed refraction as well as the resistance coefficient. Air is permitted to flow with an initial temperature of 20 °C and with an initial rate of 1 (m/sec) from the entrance of the channel. A heater with a temperature of 50 °C and flux condition of 10 (W/m2) is applied at the lower boundary of the channel. The two-dimensional incompressible and the steady-state Navier Stokes equation along with the heat equation are worked out with the Galerkin’s Least Square method using COMSOL Multi-Physics. The difference in temperature and the velocity magnitude from the entrance to the exit of the channel is contrasted in terms of angles π/18to π/4. The heat transfer coefficient, the temperature, and the local Nusselt number are calculated downstream of the plate. Moreover, we have focused the behavior or orientation of velocity field, pressure, temperature, and friction factor through the screen with the help of five straight paths arranged with equal distance. Satisfactory results are achieved when compared with the available literature. The parameters of the heat transfer are affected by the angle of the perforated plate and the Nusselt number is increasing linearly with the angles and showing the exceptional pattern for all the angles. Finally, we suggested the angle of attack to achieve the optimum results for velocity field, temperature at the downstream, friction factor and the pressure.

Keywords

• Heat transfer
• Laminar flow
• Perforated plates
• Rectangular channel
• Non-isothermal fluid flow