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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

Numerical Results

Step 6: Results

Contour plots of Axial Velocity

Note that there are two types of velocities in an LES simulation - instantaneous velocity and mean velocity. The instantaneous velocity is the actual velocity at any time instant in the domain. When we collect the statistics, the instantaneous velocity is time-averaged to obtain the mean velocity. Let us make a mid-plane in the domain to look at the contour plots of instantaneous axial velocity and the mean axial velocity.

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From the two plots we can clearly see the difference between the two velocities.

XY plot of Axial Velocity

Let us make a line across the pipe at the center of the domain to look at the mean axial velocity and compare it with the solution from k-e model in the next section.

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Save the project and close FLUENT.

Go to Step 7 - : Verification & Validation

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