DesignModeler-Static Mixer

Goals

This workshop will take you through the process of creating a geometry in DesignModeler and using the Automatic meshing method to create a simple mesh for that geometry.

The basic steps involved in creating a CFD mesh are:

– 1. Create the Geometry (DesignModeler).

– 2. Define Named Selections for some 2D regions (DesignModeler).

– 3. Create surface and volume mesh (Meshing).

This workshop is intended to give you a feel for the geometry
and mesh creation process from start to finish. Some of the methods
used and the steps you follow will be discussed and explained
in later lectures.

The geometry you will be creating and meshing is shown below:

Launch DesignModeler

Create Geometry

You will begin by creating a sketch of the main body profile which you will revolve about the Y-axis to create the main body of the mixer

1. Modeling: > ZXPlane

– Selecting ZXPlane on the tree displays the sketch plane on the Model View.

1. Click on the Look-At iconto orient the view normal to the plane.

1. Modeling: Sketching tab

– Selecting the Sketching tab after selecting a plane creates a new sketch and toggles to Sketching mode

1. Sketching: Settings > Grid

– This is a simple geometry characterized by dimensions of 2.0 m, 1.0 m, & 0.5 m. A grid can be displayed and snapped to simplify the assignment of the proper dimensions.

1. Toggle on Show in 2D and Snap to Grid
2. Click on Major Grid Spacing and set it to 1.0 m
3. Click on Minor-Steps per Major and set it to 2
4. Zoom in on the model view (click and drag with the right mouse button) so that the area displayed is centered about the origin with six major steps in the x- and z-directions.

You will now draw the outline of the main body profile as a closed-ended polyline. The profile of the polyline is shown below. Its left edge lies on the X-axis. The main portion is a square with a height and width of two. A tapered section reduces the width to 0.5 over a vertical distance of 1.0. The 0.5 width is maintained for a vertical distance of 1.0 and then the profile is closed as shown.

1. Sketching: > Draw > Polyline

– Left-click on the sketch to define each end point of the various line segments in turn. When you arrive back at the starting point, right click and select Closed End from the menu that pops up.

You have now completed Sketch1. You will now revolve this sketch by 360 degrees about the X-axis to create the main body of the mixer.

You will revolve Sketch1 by 360 degrees about the X-axis to create the main body of the mixer.

1. Click on the Revolve iconon the menu bar to bring up the Details View for the revolve 3D operation

-The view will switch to the Modeling view

1. In the Details View, the Axis box should have Apply and Cancel tabs. If these are shown, left- click on the local Y-axis (which is aligned with global X-axis) and then left-click on Apply. If the Axis box, shows Not Selected, you must left-click in it first to bring up the Apply/Cancel tabs.
2. Set the Angle to 360 degrees and leave the other settings at their default values

1. Click on Generateon the main toolbar

-You should see the solid geometry created by revolving Sketch1 through a full circle about the X-axis

You will now create a new sketch on the Z-X plane to draw the profile of the first-side pipe. The body you’ve already created may make it difficult to see the sketch clearly, so you will begin by hiding this body.

http://www.cadfamily.com/html/Article/DesignModeler-Static%20Mixer_794_1.htm

http://www.cadfamily.com/html/Article/DesignModeler-Static%20Mixer_794_2.htm