3.3.2 General Non-Reflecting Boundary Conditions (Section 7.4.2)

Under the Theory heading, after equation 7.4-43, the definition of $m_2$ should be revised, such that it reads:

Where $m_1 = \rho U_1$, $m_2 = \rho U_2$ and $m_3 = \rho U_3$ and $U_1$, $U_2$ and $U_3$ are the velocity components in the coordinate system ( $x_1$, $x_2$, $x_3$).