Purpose:
This interface is used to generate particles for SPH modeling. A number of methods are available, and here are some important notes on each:
Box, Sphere, Cylinder, Cone, and ShellVolume: SPH Mass = Den*Pitch^3 (where Den = User Specified Density)
SolidNodes: SPH particles are created at existing solid element nodes. The mass for every SPH element will be constant and equal to Vol*Den/N (where Vol = Total Volume of Solid Elements, Den = User Specified Density, N = Number of Solid Element Nodes).
SolidCenter: SPH particles are created in the center of each solid element, and the mass for each SPH element will be EleVol*Den (where EleVol = Volume of Each Solid Element and Den = User Specified Density).
ShellVolume: The body to be filled must consist of a “water tight” volume of shell element (with no free edges). However, shells normals do not need to be consistent.
NOTE: The Fill% option creates a “partial fill” which means filling up the body with MASS (not filling up to a specified volume percentage). So for the SolidNodes method, if the solid mesh is not of constant element size, it may look odd, and the density of the SPH part will not be what has been specified. For all other methods, it will fill up to the given percentage of both mass and volume.
Controls:
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- Figure 1 – Create Box
Create – Create SPH elements/nodes/parts
Modify – Modify SPH elements/nodes/parts (currently disabled)
- Method: Box (other methods listed below)
Call Position Dialog for min. coordinates
Call Position Dialog for max. coordinates
- X: Enter X coordinate for min/max coordinate point
- Y: Enter Y coordinate for min/max coordinate point
- Z: Enter Z coordinate for min/max coordinate point
- Pid: Enter part ID for the SPH part
- Nid: Enter starting node ID for the SPH part
- Pit: Enter pitch (space between particles)
- Den: Enter density of the particles
- Fill%: Enter fill volume level (%)
Set fill direction in X
Set fill direction in Y
Set fill direction in Z
- (User can also manually enter X/Y/Z direction for partial fill)
- Pid: Enter part ID for the unfilled particles (if needed)
- Den: Enter density of the unfilled portion (if needed)
Create the SPH particles
Accept the SphGen operation
Reject the SphGen operation
Exit the SphGen Interface
- Figure 2 – Sphere
- Method: Sphere (see Figure 2)
Call Position Dialog for center coordinates
- CX: Enter X coordinate for center of the sphere
- CY: Enter Y coordinate for center of the sphere
- CZ: Enter Z coordinate for center of the sphere
- Radius: Enter radius of the sphere
- Figure 3 – Cylinder / Cone
- Method: Cylinder and Cone (see Figure 3)
Call Position Dialog for base point center of the cylinder
- X: Enter X coordinate for the base point center of the cylinder
- Y: Enter Y coordinate for the base point center of the cylinder
- Z: Enter Z coordinate for the base point center of the cylinder
Call Direction Dialog for the direction of the cylinder
Set direction X with 1 or -1
Set direction Y with 1 or -1
Set direction Z with 1 or -1
- Rad1: Enter base radius
- Rad2: Enter end radius (for Cone only)
- Len: Enter length of the cylinder
Polar – Generate particles in polar coordinate system
- Figure 4 – Solid / ShellVolume
- Method: SolidCenter, SolidNodes, and SolidVolume (see Figure 4)
- PickPart – Activate picking on parts
Remove selected part from the list
- Select parts in list for operation
- Clearance – Leave gap between SPH nodes and elements (for ShellVolume only)
