2.4.3. Inlet (Supersonic)

Supersonic inlet boundaries can be specified where the local Mach number is everywhere greater than unity. Supersonic boundary conditions can only be imposed if the Total Energy model is employed, and the fluid is either an ideal gas, a real fluid, or a general fluid whose density is a function of pressure.

2.4.3.1. Mass and Momentum

At a supersonic inlet boundary, the required settings depend on the choice of Mass and Momentum > Option, as shown in Table 2.1: Supersonic Inlet Settings:

Table 2.1: Supersonic Inlet Settings

Mass and Momentum Option	Required Information
Normal Speed & Pressure	Relative static pressure Normal speed Static or total temperature
Normal Speed & Total Pressure	Relative total pressure Normal speed Static or total temperature or total enthalpy
Cart. Vel. & Pressure	Relative static pressure Cartesian velocity components Static or total temperature
Cart. Vel. & Total Pressure	Relative total pressure Cartesian velocity components Static or total temperature or total enthalpy
Cyl. Vel. & Pressure	Relative static pressure Cylindrical velocity components Static or total temperature
Cyl. Vel. & Total Pressure	Relative total pressure Cylindrical velocity components Static or total temperature or total enthalpy
Static and Total Pressure	Relative static pressure Relative total pressure Total temperature

Note: For rotating domains, the total pressure is interpreted with respect to the stationary frame of reference.