Flow Around a Blunt Body- Ansys CFX Tutorial
This tutorial is the part of ANSYS CFX official tutorial.
To download the files and resources used in this video-
https://streamcfd.in/
In this tutorial you will learn about:
• Solving and postprocessing a case where the geometry has been omitted on one side of a symmetry plane.
• Using free-slip wall boundaries as a compromise between accurate flow modeling and computational grid size.
• Accurately modeling the near-wall flow using Shear Stress Transport (SST) turbulence model.
• Running the CFX-Solver in parallel (optional).
• Creating vector plots in CFD-Post with uniform spacing between the vectors.
Overview of the Problem to Solve
In this tutorial, a generic vehicle body is placed into an oncoming side wind of 15 m/s. The turbulence will be set to Intensity and Length scale with a value of 0.05, which corresponds to 5% turbulence, a medium level intensity, and with an Eddy Length scale value of 0.1 m. The goal of this tutorial is to set up, simulate, and then visualize the flow around the body. Since both the geometry and the flow are symmetric about a vertical plane, you will only use half of the geometry to find the solution. You will use free-slip wall boundaries on some sides of the domain to model external flow. The flow near the body is modeled using Shear Stress Transport. Since compressibility effects are not expected to be significant, you can model this as incompressible flow.