23.3.11 Point Properties for Effervescent Atomizer Injections

For an effervescent atomizer injection, you will specify some of the same properties as for a plain-orifice atomizer. In addition to the position, axis (if 3D), temperature, mass flow rate (including both flashing and nonflashing components), duration of injection (if unsteady), vapor pressure, injector inner diameter, and azimuthal angles (if relevant) described in Section  23.3.7, you will need to specify the following parameters under Point Properties:

• mixture quality

  Set the mass fraction of the injected mixture that vaporizes in the Mixture Quality field ( $x$ in this equation in the separate Theory Guide).

• saturation temperature

  Set the saturation temperature of the volatile substance in the Saturation Temp. field.

• droplet dispersion

  Set the parameter that controls the spatial dispersion of the droplet sizes in the Dispersion Constant field ( $C_{\rm eff}$ in this equation in the separate Theory Guide).

• spray angle

  Set the initial trajectory of the film as it leaves the end of the orifice in the Maximum Half Angle field.

See this section in the separate Theory Guide for details about how these inputs are used.