Volume 18: Sustainable Energy Solutions for a Post-COVID Recovery towards a Better Future: Part I

Numerical simulation of the effects of temperature-dependent thermal conductivity and viscosity on temperature and velocity fields Mehrdad Ahmadinejad, Ali Soleimani, Nafiseh Yazdi, Mohsen Abdolahzadeh

Abstract

The present study numerically investigates the effects of the variations of thermal conductivity and viscosity with temperature on velocity and temperature fields. The simulation is performed in a two-dimensional steady channel flow. The velocity profile is first validated against its analytical solution for the case of constant properties. A good agreement between numerical and analytical solutions is observed. From a physical point of view, it is revealed that by increasing the temperature in liquids, the fluid elements near the high-temperature wall are moving faster compared to those adjacent to the low-temperature one.

Keywords temperature-dependent properties, channel flow, numerical solutions, laminar flow