Problem Specification — Lesson 1

Problem Specification

Consider fluid flowing through a cylindrical pipe of diameter D = 0.0127 m and length L = 5D = 0.0635 m. The bulk velocity at the pipe inlet is U_{bulk =} 6.58 m/s. Let us consider the case where the density of the fluid is constant. Take density ρ = 1.331 kg/m³ and coefficient of viscosity µ = 2.34 x 10^-5 kg/(ms). The Reynolds number, Re, based on the pipe diameter and the bulk velocity is

Solve the above fluid flow problem using the LES capability in Ansys Fluent via Ansys Workbench. Plot the mean and the root mean square velocities versus the radial distance at a particular x/D downstream of the inlet. Compare the mean velocity obtained from the LES simulation with the mean velocity obtained using the k-ε model.