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  • Turbulent Pipe Flow (LES) - Physics Setup
  • Created by user-c6244, last modified by user-be015 on Sep 25, 2012

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Author: Ranjith Tirunagari, Cornell University

Problem Specification
1. Pre-Analysis & Start-Up
2. Geometry
3. Mesh
4. Setup (Physics)
5. Solution
6. Results
7. Verification & Validation

Step 4: Setup (Physics)

Regardless of whether you downloaded the mesh and geometry files or if you created them yourself, you should have checkmarks to the right of Geometry and Mesh. Your current Workbench Project Page should look comparable to the following image.

A question mark should appear to the right of the Setup cell. This indicates that the Setup process has not yet been completed. This means that the mesh and the geometry data need to be read into FLUENT.

Launch Fluent

Double click on Setup in the Workbench Project Page which will bring up the FLUENT Launcher. When the FLUENT Launcher appears change the Options to "Double Precision", and Processing Options to "Parallel (Local Machine)" with Number of Processes equal to "4" or to the available number of processors at your end. Click OK as shown below. Higher Resolution Image

Twiddle your thumbs a bit while the FLUENT interface starts up. This is where we'll specify the governing equations and boundary conditions for our problem. On the left-hand side of the FLUENT interface, we see various items listed under Problem Setup. and Solution. We will work from top to bottom of both these items to setup the physics of our boundary-value problem. On the right hand side, we have the Graphics pane and, below that, the Command pane.

Check and Display Mesh

First, the mesh will be checked to verify that it has been properly imported from Workbench. (Click) Mesh > Check and make sure that the minimum volume is positive. It is a good practice to check if x/y/z - domain extents are according to the dimensions given in the problem specification.

In order to obtain the statistics about the mesh (Click) Mesh > Info > Size, as shown in the image below.

Then, you should obtain the following output in the Command pane.

In order to bring up the display options (Click) General > Mesh > Display. Make sure you have inlet, outlet, pipewall and interior-solid in Surfaces as shown in the figure below.

Please review the "Laminar Pipe Flow" tutorial to understand how to rotate, zoom-in and zoom-out the geometry in the Graphics Window.

Go to Step 5 - Solution
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