Numerical Study of Heat Transfer Characteristics of a Channel with Triangular Wall

Abstract

The heat transfer characteristics of the channel are numerically investigated using ANSYS 15.0. The top-wall is made wavy with triangular in shape. Four different geometries were taken varying the number of waves on the top-wall. The length and width of the channel is 1000mm and 20mm respectively. The amplitude of the wave is 5mm. The numbers of waves are taken as 2, 4, 6 and 8. The inlet is kept as velocity-inlet with inlet velocity of 0.05m/s and temperature of 300K. The top-wall is set as wall and a constant temperature of 350K is set. The bottom-wall is kept as wall and a constant temperature of 300K is set. The outlet is set as pressure-outlet. The contours of velocity and temperature are investigated. The variation of Local Nusselt number with length of the channel is studied by extracting the values of wall flux on top-wall, top-wall temperature and fluid temperature from the solution. It is observed that as the numbers of waves increase, the average Nusselt number increases, thus enhances the convective heat transfer.