Rayleigh Flows - Homework


Chemical lasers are used in industry for precise cutting and for drilling. The flow that moves in the cavities of the glass resonator that generates the laser beam is subject to heat addition due to chemical reactions and molecular vibrational energy. These types of flows are examples of the physics described by Rayleigh flows. Indeed, the effect of the heat cannot be ignored. As the flow gets heated, its total temperature rises and the fluid accelerates or decelerates depending on whether the fluid speed is subsonic or supersonic.



In this homework, you will learn how to simulate Rayleigh flows inside a duct using the density-based solver in Ansys Fluent. You will explore the physics of heat addition to compressible inviscid flows.


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

Alternate video link.


Let’s now analyze the simulation and understand the physics of Rayleigh flows.