This page is under construction. Check back for updates. For now, please download the file below to continue working on this simulation
Skip Creating the Geometry and Meshing
If you wish to skip creating the geometry and mesh, then you can download the meshed geometry here shortly. Download the compressed folder, then extract the files to your working directory. If you download the geometry you may skip steps 2 and 3 of this tutorial.
Geometry
Download the Airfoil Coordinates
In this step, we will import the coordinates of the airfoil and create the geometry we will use for the simulation. Begin by downloading this file here and saving it somewhere convenient. This file contains the points of a NACA 0012 airfoil.
Launch Design Modeler
Before we launch the design modeler, we need to specify the problem as a 2D problem. Right click Properties. In the Properties of Schematic A2: Geometry Window, select Analysis Type > 2D. Now, double click to launch the Design Modeler. When prompted, select Meters as the unit of measurement.
and selectAirfoil
First, we will create the geometry of the airfoil. In the menu bar, go to Concept > 3D Curve. In the Details View window, click Geometry File and select the ellipsis to browse to a file. Browse to and select the geometry file you downloaded earlier. Once you have selected the desired geometry file, click to create the curve. Click to get a better look at the curve.
Next, we need to create a surface from the curve we just generated. Go to Concepts > Surfaces from Edges. Click anywhere on the curve you just created, and select Edges > Apply in the Details View Window. Click to create the surface.
Create C-Mesh
Now that the airfoil has been generated, we need to create the meshable surface we will use once we begin to specify boundary conditions. We will begin by creating a coordinate system at the tail of the airfoil - this will help us create the geometry for the C-mesh. Click Type > From Coordinates. For FD11, Point X, enter 1
.
Click Plane 4), then click to create a new sketch. This will create a sketching plane on the XY plane with the tail of the airfoil as the origin. At the bottom of the Tree Outline Window, click the Sketching tab to bring up the sketching window.
to generate the new coordinate system. In the Tree Outline Window, select the new coordinate system you created (defaulted toThe first action we will take is create the arc of the C-Mesh. Click
. The first click selects the center of the arc, and the next two clicks determine the end points of the arc. We want the center of the arc to be at the tail of the airfoil. Click on the origin of the sketch, making sure the P symbol is showing
For the end points of the arc, first select a point on the vertical axis above the origin (a C symbol will show), then select a point on the vertical axis below the origin. You should end up with the following:
To create the right side of the C-Mesh, click
. Click the following points to create the rectangle in this order - where the arc meets the positive vertical axis, where the arc meets the negative vertical axis, then anywhere in the right half plane. The final result should look like this:
Now, we need to get rid of necessary lines created by the rectangle. Select Modify in the Sketching Toolboxes window, then select . Click the lines of the rectangle the are collinear with the positive and negative vertical axises. Now, select the Dimensions toolbox to dimension the C-Mesh. Click , followed by the arc to dimension the arc. Assign the arc a value of 12.5
. Next, select . Click the vertical axis and the vertical portion of the rectangle in the right half plane. Also assign the horizontal dimension a value of 12.5
.
Click here to enlarge the image
Next, we need to create a surface from this sketch. To accomplish this, go to Concept > Surface From Sketches. Click anywehere on the sketch, and select Base Objects > Apply in the Details View Window. Also, select Operation > Add Frozen. Once you have the correct settings, click . The final step of creating the C-Mesh is creating a surface between the boundary and the airfoil. To do this, go to Create > Boolean. In the Details View window, select Operation > Subtract. Next, select Target Bodies > Not selected, select the C-Mesh surface, then click Apply. Repeat the same process to select the airfoil as the Tool Body.
title=Skip Creating the Geometry and Meshing
Because the C_Mesh and the airfoil overlap, once you click in the vicinity of the airfoil ANSYS will select the C-Mesh but give you the option of selecting multiple layers
Select the layer that corresponds to the airfoil and the airfoil will be highlighted.