Laminar versus Turbulent Jet — Homework

Overview

Jet flows can be observed in many engineering applications: jets from automobile exhaust pipes, jacuzzi bathtub jets and powerful jets from aircraft jet engines. Objectives behind engineering analysis of jets include, among others, jet impact on downstream objects and flow mixing induced by jet flows. While most practical jets are turbulent, laminar jets develop in some situations, like a trickle water jet from a faucet.

Objective

In this example, we compare laminar and turbulent round jet flows and analyze the differences in their decay rates.

Setup

Download the Mesh file needed for setting up the simulation and the associated Case & Data files here. Follow the instructions below to set up this simulation in Ansys Fluent starting with a Mesh file. In case you face any issues setting up or running the simulation, please refer to the corresponding initial and final Case and Data files.

Alternate video link.

Results and Discussion

Let’s now analyze and compare the decay rates for the two jets.