Injections

• Pattern . The points are evenly distributed over the selected Planes, Faces, Sketches, Curves and Edges .

  Select a plane, sketch or curve in the flyout FeatureManager design tree or in the graphics area select an edge or surface.

  • Select the Mesh based point generation option, if you want to distribute the starting points over the computational mesh cells on the selected planes, model faces, surfaces, sketches, curves, or edges.

  • If a plane is selected, you can specify the Offset  of the points plane from the selected reference plane by using the slider or typing the offset value in the box. You can specify an individual offset for each of the selected planes.

  • Specify Number of Points  or Spacing  defining the distance between the points.

• Pick from Screen . Allows you to select points on a plane or planar face in the graphics area.

  1. In the graphics area or in the flyout FeatureManager design tree select a Plane or Planar Face .

     The only requirement for assemblies is that you must select planes that belong to the top-level assembly.

     You can specify the Offset  reference plane by using the slider or typing the offset value in the box.

  2. Click Pick Points  to allow the point selection.

     Tip

     We recommend to use the Normal To view while you select points.

  3. Click at the selected plane or face in the graphics area to select a point on the plane. The point is automatically added to the table. The table contains all the selected points.

     To remove a point, select the point in the table and click Delete Point . You can also remove all points from the table by clicking Delete All .

• Coordinates . Allows you to specify a set of points by creating a table with points coordinates.

  To add a point to the table , type X, Y and Z Coordinate of the point and click Add Point . You can edit point coordinates directly in the table .

  To edit point coordinates, double-click the cell and type the desired value.

  To remove a point, select the point in the table and click Delete Point . You can also remove all points from the table by clicking Delete All .

  While specifying points coordinates you can also import data from *.csv and *.txt files. The values in the file must be separated by commas or semicolons. To import data from the file, click Import File and then select the appropriate file.

  You can also copy coordinate values from Microsoft Excel. Create a table of points in Microsoft Excel. The x, y and z coordinates must be specified one after another in a row (the same as in the table). Copy the Microsoft Excel table into the Clipboard, then click on the table in the dialog and press Ctrl+V. All points that are inside the Computational Domain will be inserted into the table.

• From File . You can specify the coordinates of starting points and initial conditions in a text file, and import this file to define the injection (see “File Format for Starting Points Definition (Particle Study)” for details).

  Click Browse  to select the previously created file.

• Diameter . The flow influences the particle temperature and, as a result, the particle density. Since the considered particles are particles of constant mass, the particle volume is variable.

• Material . A material (liquid or solid) of the particles.

  1. Select a material type (Liquid or Solid) from the Material list.

  2. Select the desired material from the list of the available materials specified in the Engineering Database. If you want to add a new material to the Engineering Database or edit an existing one, click Create/Edit to open the Engineering Database (see “Engineering Database” for details).

The value of the Mass Flow Rate  are injected through the opening in a unit time. The mass flow rate is used to calculate the total erosion/accumulation mass rate (see also “Physical Features (Particle Study)”).

• Select the Relative or Absolute velocity condition type, which allows you to specify the initial particle velocity vector:

  • Relative.The particle velocity vector has the same direction as the flow velocity vector at the particle starting point.

  • Absolute.The particle velocity vector is specified through the X, Y and Z components of the velocity vector with respect to the reference coordinate system.

• If the Relative velocity condition type is selected, you can specify Velocity Magnitude .

  The Velocity Magnitude value is a difference between the velocities of the particle and the flow at the start point. If the Velocity Magnitude value is equal to zero, the flow velocity and initial particle velocity are identical.

• If the Absolute velocity condition type is selected, you can specify the velocity components in X-, Y- and Z-directions of the reference Coordinate System .

• Select the Relative or Absolute velocity condition type, which allows you to specify the initial particle temperature either as absolute or relative to the fluid temperature.

  For the Relative type, the specified temperature is a difference between the particle and the fluid temperatures at the particle starting point. Negative value corresponds to the lower temperature of the particles with respect to the fluid temperature.

• Specify the initial particle Temperature  value.

  If the Relative temperature condition type is selected, zero temperature means that the initial temperature of the particle at the start point is the same as the fluid temperature.