Understanding water pressure

00:03

Before modeling water supply networks,

00:06

you must have a basic understanding of

00:07

the terminology used when discussing water pressure,

00:11

pressure is the force of a fluid.

00:14

More specifically,

00:15

pressure refers to the amount of force exerted by a fluid per unit area.

00:21

Head is the energy of a fluid

00:23

head or age. In measurement notation is expressed as a height or column of the fluid.

00:29

Specifically,

00:30

head measures the potential or kinetic energy at a given point in a fluid.

00:35

This includes energy associated with the movement of the fluid.

00:39

The energy from the fluid's static pressure

00:41

and the energy from the height of the fluid relative to a

00:44

atom

00:46

in the water industry. Pressure often means pressure head

00:50

head used by itself, often means pressure head above a datum such as sea level.

00:56

A simple way to visualize the relationship between pressure and head

00:60

is by imagining connecting a pressure gauge to a pipe.

01:04

The gauge reads five bar which is the force exerted on the gauge's sensor.

01:09

This force equates to a pressure head of 50 m of

01:12

water or the energy of the water relative to the pipe.

01:17

Another way to imagine it

01:18

a column of water that measures five bar would reach 50 m above the pipe.

01:24

This more linear way of thinking about pressure

01:26

streamlines the process of predicting the differences of

01:29

static pressure or the pressure in a fluid

01:32

that is unmoving between points of reference.

Video transcript

00:03

Before modeling water supply networks,

00:06

you must have a basic understanding of

00:07

the terminology used when discussing water pressure,

00:11

pressure is the force of a fluid.

00:14

More specifically,

00:15

pressure refers to the amount of force exerted by a fluid per unit area.

00:21

Head is the energy of a fluid

00:23

head or age. In measurement notation is expressed as a height or column of the fluid.

00:29

Specifically,

00:30

head measures the potential or kinetic energy at a given point in a fluid.

00:35

This includes energy associated with the movement of the fluid.

00:39

The energy from the fluid's static pressure

00:41

and the energy from the height of the fluid relative to a

00:44

atom

00:46

in the water industry. Pressure often means pressure head

00:50

head used by itself, often means pressure head above a datum such as sea level.

00:56

A simple way to visualize the relationship between pressure and head

00:60

is by imagining connecting a pressure gauge to a pipe.

01:04

The gauge reads five bar which is the force exerted on the gauge's sensor.

01:09

This force equates to a pressure head of 50 m of

01:12

water or the energy of the water relative to the pipe.

01:17

Another way to imagine it

01:18

a column of water that measures five bar would reach 50 m above the pipe.

01:24

This more linear way of thinking about pressure

01:26

streamlines the process of predicting the differences of

01:29

static pressure or the pressure in a fluid

01:32

that is unmoving between points of reference.

Video quiz

When modeling water supply networks, pressure refers to which of the following?

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Before modeling water supply networks, you must have a basic understanding of the terminology used when discussing water pressure.

A presentation slide containing the definitions of pressure and head.

A presentation slide outlining a practical example of pressure and head.

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