unsteady-state flow

unsteady-state flow

[¦ən′sted·ē ¦stāt ′flō]
(fluid mechanics)
A condition of fluid flow in which the volumetric ratios of two or more phases (liquid-gas, liquid-liquid, and so on) vary along the course of flow; can be the result of changes in temperature, pressure, or composition.
References in periodicals archive ?
For both flow parameters, the effect is insignificant for the unsteady-state flow. A slight increase in g'(0,[xi]) with increase in both Pr and Sc is reported towards the steady-state flow.
The effect of the Schmidt number on the local Nusselt number is insignificant for the unsteady-state flow as displayed in Figure 23.
The flow conditions capture unsteady-state flow, gravity, and capillarity that are common in actual field scenario but are often neglected in many laboratory estimations of relative permeability of gas-liquid systems.