What does datum mean in fluid mechanics?

(engineering) A line which serves as a reference or base for the measurement of other quantities.

Is datum head and elevation head same?

With this in view, a datum is required from which locations are measured. The elevation head (hz) of any point is its height above the datum line. The height of water level in the standpipe above the datum is the piezometric head (h).

What does head mean in fluid mechanics?

Definition of ‘fluid head’ Fluid head is the height of a vertical column of fluid and represents mechanical energy per pound of fluid. The fluid head is the pressure which is measured by the height to which fluid that is being pumped can be raised by the pressure.

What is the purpose of datum line?

Datum-line meaning (engineering) A line which serves as a reference or base for the measurement of other quantities.

What is a datum surface?

In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made. Datum reference frames are used as part of the feature control frame to show where the measurement is taken from.

What does hydraulic head represent?

Hydraulic head is one of the key variables in describing a groundwater system. It represents the mechanical energy per unit weight of fluid in the system. The pressure head represents the energy due to pore fluid pressure, and the elevation head represents the gravitational potential energy arising from elevation.

What is the head difference?

In the proposed equations, the head difference is expressed as a function of the inserted depth of the barrier into confined aquifer, the ratio of the hydraulic conductivity of the aquifer, the thickness of the aquifer, and hydraulic gradient under normal conditions.

What is hydraulic datum?

Datum head: It is the head possessed by fluid due to height above the datum. Unit: meter (m) ii. ii. Pressure head: It is the head possessed by fluid due to pressure force by the flowing fluid.