## 1.7. Rotational Forces

For flows in a rotating frame of reference, rotating at a constant angular velocity , additional sources of momentum are required to account for the effects of the Coriolis force and the centrifugal force:

| (1–176)

where:

| (1–177)

| (1–178)

and where is the location vector and is the relative frame velocity (that is, the rotating frame velocity for a rotating frame of reference).

In the energy equation, the advection and transient terms use the rothalpy, , defined by Equation 1–179, in place of the total enthalpy.

| (1–179)

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