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Geometry
Launch ANSYS Workbench: Start > All Programs > ANSYS > Workbench
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For users of ANSYS 15.0, please check this link for procedures for turning on the Auto Constraint feature before creating sketches in DesignModeler. |
Strategy for Geometry Creation
In order to create the desired geometry we will first create a surface body for the cylinder. Next, we will create a surface body for the outer boundary as a "frozen body", so that it doesn't merge with the first surface body. Then, we will use a boolean operation to subtract the small surface body from the large surface body. At this point, we will have the surface body of the outer boundary with a hole in the middle where the cylinder is. Lastly, we will project a vertical line on to the geometry, so that radial edge sizing can be implemented in the meshing process.
Fluid Flow(FLUENT) Project Selection
Drag Fluid Flow(FLUENT) into the Project Schematic window.
Analysis Type
(Right Click) Geometry > Properties
Set Analysis Type to 2D
Launch Design Modeler
(Double Click) Geometry
Create Inner Circle and Dimension
Create a circle, centered around the origin in the xy plane. Set the diameter of the circle to 1m.
Inner Circle Surface Body Creation
Concept > Surfaces From Sketches .
Set the Base Object to Sketch 1 (located underneath XYPlane in the Tree). You can do this by clicking within the tree or you can click on the circle to select Sketch 1. Then click Apply next to Base Object .
Click Generate
Create New Sketch in the XY Plane
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Create Outer Circle and Dimension
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Outer Circle Surface Body Creation
In this step the Surface Body will be created as a frozen, such that it does not merge with the inner circle surface body.
Concept > Surfaces From Sketches .
Set the Base Object to Sketch 2 (located underneath XYPlane in the Tree). You can do this by clicking within the tree or you can click on the outer circle to select Sketch 2. Then click Apply next to Base Object .
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Carry Out Boolean Operation: Subtraction
In this step, the inner circle will be subtracted from the outer circle in order to obtain the desired geometry.
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Create Flow Domain
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<iframe width="560" height="315" src="https://www.youtube.com/embed/4O3nUq5Vzok?rel=0" frameborder="0" allowfullscreen></iframe> |
Imprint Lines to Control Mesh Sizing
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<iframe width="560" height="315" src="https://www.youtube.com/embed/cNMyaJB5hsU?rel=0" frameborder="0" allowfullscreen></iframe> |
Close Design Modeler and Save Project
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<iframe width="560" height="315" src="https://www.youtube.com/embed/j7ydNoeIt-0?rel=0" frameborder="0" allowfullscreen></iframe> |
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Create a Bisecting Line
The purpose of this step and the following two steps is to imprint a line onto the geometry that will, allow for radial edge sizing in the meshing step.
Click on XYPlane in the tree and it should highlight blue. Then, click the new sketch button, . In the new sketch draw a line on the y axis that goes through both of the concentric circles. Make sure that it is coincident to the y axis. Then trim the line segments that lay inside of the inner circle and the line segments that lay outside of the outer circle. This, is carried out by using the Trim feature located in the Modify portion of Sketching .
Line Body Creation
Concept > Lines From Sketches .
Set the Base Object to Sketch 3. (located underneath XYPlane in the Tree). Click Generate
Projection
Tools > Projection .
Apply the two lines that you created to edge and apply the surface body to target. You must do these steps by using the line selection filter and the surface selection filter. For the two lines hold down control to select them both. Click Generate .
Suppress Line Bodies
Under "Tree Outline", expand "3 Parts, 3 Bodies". Find the two line bodies, right click and choose suppress.
Change type to "Fluid"
Under "Tree Outline", expand "3 Parts, 3 Bodies" and select "Surface Body". Then set the type "Fluid/Solid" to Fluid.
Close Design Modeler and Save Project
To save the project, first close the design modeler and at the workbench window, go to files -> archive. If you choose "save", it will save it as two items: a file and a folder whereas the archive option saves it as one integrated item.
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