Which variables are sufficient to model a $3-$D incompressible flow, and which equations are required to

be solved for the flow field? Select all that apply.

Partial credit will be given for each correct answer. Incorrect answers are negatively marked, but the

lowest available score for the question is zero.

Energy equation

$u_1$ velocity

Continuity

$x_1$ momentum

molecular viscosity

$u_3$ velocity

Equation of state

$x_3$ momentum

Pressure

Temperature

viscosity equation $($such as Sutherland's Law$)$

$u_2$ velocity

$x_2$ momentum

Density