Pre-Analysis & Start-Up

Pre-Analysis

In the Pre-Analysis step, we'll review the following:

• Mathematical model: (e.g.: We'll look at the governing equations + boundary conditions and the assumptions contained within the mathematical model.)
• Numerical solution procedure in ANSYS: (e.g.: We'll briefly overview the solution strategy used by ANSYS and contrast it to the hand calculation approach.)
• Hand-calculations of expected results: (e.g.: We'll use an analytical solution of the mathematical model to predict the expected stress field from ANSYS. We'll pay close attention to additional assumptions that have to be made in order to obtain an analytical solution.)

Mathematical Model 

IS THE SAME AS PART 1?

In part 1 we only analyzed one position of the hub relative to the incoming wind, which might be an over-simplification. We also didn't account for the vortices generated by the blades passing upwind on the blades downstream.

All of these will be accounted in this Sliding Mesh method. In this case Fluent will actually move all components of the geometry and solve a transient problem.

Numerical Solution Procedure in ANSYS

Hand-Calculations of Expected Results

Start-Up

Outline: 

Open previous file. (we will use the same file)

Duplicate the project. Name it "Sliding Mesh".

Drag Solution from MRF to Sliding Mesh. (this will link the two simulations and import all setup (and above) configurations that we inputted in the MFR case to the new sliding mesh. This way, we don't need to recreate all the interfaces and cell zone conditions)

This will also allow us to use the steady solution as a starting point for the transient analysis. 

Go to Step 2: Geometry

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