Here the Poisson physics mode is used to model the equation for potential flow.Switch to Equation mode by clicking on the corresponding Mode Toolbar button.Press the Generate button to call the grid generation algorithm.This will create structured and higher quality grid cells near the airfoil boundaries. Also select the Boundary layers checkbox.This will ensure that the airfoil boundaries are resolved with fine grid cells, while the rest of the domain uses a coarse grid. To fine tune the settings, enter 0.3 in the Subdomain Grid Size edit field and 0.3 0.3 0.3 0.3 0.05 0.05 for the Boundary Grid Size.Press the Settings button to open the Grid Settings dialog box, and select the Gridgen2D grid generation algorithm. The default grid may be too coarse to ensure an accurate solution.Switch to Grid mode by clicking on the corresponding Mode Toolbar button.Press the - / Subtract geometry objects Toolbar button.Select E1 and N1 in the geometry object Selection list box.Enter 1.5 into the y radius edit field.Enter 1.5 into the x radius edit field.
Enter 0.5 0 into the center edit field.To modify and edit the selected ellipse, click on the Inspect/edit selected geometry object Toolbar button to open the Edit Geometry Object dialog box.Select E1 in the geometry object Selection list box.Move the mouse pointer to draw the shape outline, and release the button to finalize the shape. Then left click in the main plot axes window, and hold down the mouse button. To create a circle or ellipse, first click on the Create circle/ellipse Toolbar button.Press OK to finish and close the dialog box.Enter 100 into the resolution edit field.Press the Create NACA airfoil Toolbar button.Press OK to finish the physics mode selection.Enter phi into the Dependent Variable Names edit field.Select the Poisson Equation physics mode from the Select Physics drop-down menu.To start a new model click the New Model toolbar button, or select New Model.> Fluid Dynamics > Potential Flow Over an Airfoil from the File menu, viewed as a video tutorial, or alternatively, follow the step-by-step instructions below. This model is available as an automated tutorial by selecting Model Examples and Tutorials.
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