What is meant by subcritical flow?

Subcritical Flow: Depths of flow greater than critical depths, resulting from relatively flat slopes. Froude number is less than one. Flow of this type is most common in flat streams. Supercritical Flow: Depths of flow less than critical depths resulting from relatively steep slopes. Froude number is greater than one.

What is critical and sub critical flow?

Critical flow is unstable and a small fluctuation in energy will shift the flow into supercritical or subcritical flow. Mild Slope is less than the critical slope and the normal depth is greater than critical depth (yn>yc). The flow is subcritical and controlled downstream.

What is the supercritical process?

Supercritical fluid extraction (SFE) is the process of separating one component (the extractant) from another (the matrix) using supercritical fluids as the extracting solvent. Extraction is usually from a solid matrix, but can also be from liquids.

What is torrential flow?

Abstract: Torrential flow is the highest velocity flow that can occur in a given reach of a natural channel, when slope is higher than a given value, (close to 0.001). Such flows occur in mountain streams, and in streams in the piedmont areas, dominated by alluvial cone depositional geo forms.

Is the flow subcritical critical or supercritical?

Subcritical flow is dominated by gravitational forces and behaves in a slow or stable way. It is defined as having a Froude number less than one. Supercritical flow is dominated by inertial forces and behaves as rapid or unstable flow.

What makes a fluid supercritical?

A supercritical fluid (SCF) is any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist, but below the pressure required to compress it into a solid.

What is supercritical velocity?

A supercritical flow is a flow whose velocity is larger than the wave velocity. The analogous condition in gas dynamics is supersonic.