Combined heat transfer in a horizontal square channel

Elham Mozafar¹

1) Iran University of Science and Technology Email:

Publication : 3rd International Congress On Engineering, Technology and Innovation(eticong.com/3rd)
Abstract :
This paper presents a numerical study on the two-dimensional laminar mixed convective flow and heat transfer around two identical isothermal square cylinders arranged in tandem and confined in a channel. The major thermal and geometric parameter includes variable wall temperatures, wall surface emissivity, Reynolds number, heat flux and air chosen as the working medium. Due to the wall surface emissivity of the channel, the internal wall surface radiation will significantly change the rate of total heat transfer inside the channel. The rotational velocity method is used to solve the Navier-Stokes three-dimensional equations and the energy equation simultaneously. The complete differential equations of radiant heat transfer are solved by the method of separate axes. The results focus on the effects of natural displacement and radiative heat transfer on the development of temperature, coefficient of friction and Nusselt number. The results show that the effects of radiation play a very important role in heat transfer and reduce the effects of buoyancy on free displacement. In addition, the development of temperature is accelerated by radiation.
Keywords : Keywords: Heat flux redistribution Mixed heat transfer Heattransfercoefficient Navier-Stokes