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  • Wind Turbine Blade FSI (Part 1) - Physics Setup
  • Created by user-0108f, last modified by Unknown User (jme226) on Nov 15, 2018

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Authors: Sebastien Lachance-Barrett (Cornell University) & Edwin Corona (University of Waterloo)

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

Physics Setup

Governing Equations

In the following video, we go into FLUENT and specify the governing equations that we will use.

Summary of steps in the above video:

  1. Fluent Launcher
    1. Select double precision
    2. Select parallel and choose the number of cores, I recommend using as many as you have but note that you need a special HPC license if you choose to use more than 4 cores.
  2. Models
    1. Edit viscous
      1. K-omega
      2. SST
  3. Cell zone conditions
    1. Edit Fluid
      1. Enable Frame Motion
      2. Specify angular velocity to be -2.22 m/s

Boundary Conditions

We now specify the boundary conditions. 

Summary of steps in the above video:

  1. Boundary Conditions
    1. Inlet
      1. Velocity magnitude: 12m/s
    2. Inlet-Top
      1. Component (X,Y,Z): (0,0,-12m/s)
    3. Blade
      1. Default, wall
    4. Periodic 1 and Periodic 2
      1. Change to Interface
  2. Mesh Interface
    1. Click Create/edit
      1. Name the mesh interface periodic
      2. Enable Periodic Boundary Condition
      3. Enable matching
      4. Type is Rotational
      5. Offset angle is 120 degrees
      6. Choose the interface zones to be periodic 1 and periodic 2

The order in which the interface zones is selected matters because of how the offset is computed.

Make the first interface zone periodic 1 and second interface zone periodic 2.

Otherwise, you may get the error: Cannot intersect two interfaces.

ANSYS 19.1 Users

To access the interface dialog shown in the above video, make sure "Period 1" and "Period 2" are labeled as interfaces under Boundary Conditions.

 Once you do this, a section called "Mesh Interfaces" appears in the tree. Double click this. In the window that opens, click "Manual Create" at the bottom.

This opens the window that is shown in the above video. Follow the steps of the video from here.

 

Also: If you named both quadrilateral surfaces, but only one is now appearing in the Setup stage, rename them "surface 1" and "surface 2".

 



Go to Step 5: Numerical Solution

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