Change the mixing rules for transport property calculations

For Compositional Fluids, you can select the mixing rule that you want to use to calculate the following transport properties:

• Vapor thermal conductivity

• Liquid thermal conductivity

• Liquid surface tension

• Vapor viscosity

• Liquid viscosity

You can change the mixing rules for the vapor thermal conductivity and vapor viscosity only when the Fluid contains a vapor phase. You can change the mixing rules for the liquid thermal conductivity, liquid surface tension, and liquid viscosity only when the Fluid contains a liquid phase.

Change the mixing rules for the transport property calculations

1. In the Fluid Editor, expand the Transport Mixing Rules section.

2. If the Fluid contains a vapor phase (that is, if you set the Phases list for the Fluid to any selection other than Liquid Only), do the following:

   1. In the Vapor Conductivity list, select the desired mixing rule. See Available mixing rules for vapor conductivity for descriptions of the available mixing rules.

   2. In the Vapor Viscosity list, select the desired mixing rule. See Available mixing rules for vapor viscosity for descriptions of the available mixing rules.

3. If the Fluid contains a liquid phase (that is, if you set the Phases list for the Fluid to any selection other than Vapor Only), do the following:

   1. In the Liquid Conductivity list, select the desired mixing rule. See Available mixing rules for liquid conductivity for descriptions of the available mixing rules.

   2. In the Liquid Surface Tension list, select the desired mixing rule. See Available mixing rules for liquid surface tension for descriptions of the available mixing rules.

   3. In the Liquid Viscosity list, select the desired mixing rule. See Available mixing rules for liquid viscosity for descriptions of the available mixing rules.