About Moving Heat Flux

Moving heat flux uses an event series that describes the motion of the laser over time. This event series also contains information about the laser power, including whether it is turned on or off.

You have access to additional controls, such as the heat density model of the laser power. By default this distribution is concentrated, which means the energy is concentrated on a single point. Offset type is ignored if you use this distribution

You can also select uniform, which will model the energy density as a box. Offset type is used, along with entries for subdivisions, offset values, and box lengths to define the region of influence around the laser.

The last selection option is the double ellipsoid Goldak model. Used with entries for subdivisions, a, b, cf, cr, ff, and fr, and a box size factor to define the region of influence around the laser.

If you select an energy distribution other than concentrated, you can also control energy offset type and direction. These settings are ignored for the concentrated distribution.

You must supply the absorption value, which describes the fraction of heat energy absorbed by the part. This value must be between 0 and 1. By default, the aborption is a single value, but the user can specify temperature-dependent

You can decide whether to conserve total energy or not. This setting applies to the laser near the edge of the part boundary. If this setting is off, some of the heat generated by the laser will be lost at the part boundary. If on, all of the energy will be added to the part.

If you create the simulation with a build setup from the DELMIA Powder Bed Fabrication application, this application will generate the event series that controls the element activation, and the moving heat flux feature will select it by default. You have the option to override this event series with an external event series if you so desire.