## What is meant by hydraulic gradient line?

: a line joining the points of highest elevation of water in a series of vertical open pipes rising from a pipeline in which water flows under pressure.

## What is Hgl and TGL?

Total energy line is basically defined as the line which will give the sum of pressure head, potential head and kinetic head of a fluid flowing through a pipe with respect to some reference line. Total energy line = Pressure head + Potential head + Kinetic head. H.G.L = P/ρg + Z + V 2/2g.

## What would happen if two streamlines intersect?

If the two streamlines intersect each other, it signifies two direction of velocity which cannot be possible. Thus, two streamlines cannot intersect each other.

## What does streamlining mean?

transitive verb. 1 : to design or construct with a streamline. 2 : to bring up to date : modernize. 3a : to put in order : organize. b : to make simpler or more efficient a system that streamlines the process.

## What is the Eulerian description of fluid motion?

There are two ways to describe the fluid motion. One is called Lagrangian, where one follows all fluid particles and describes the variations around each fluid particle along its trajectory. The other is Eulerian, where the variations are described at all fixed stations as a function of time.

## What is the Lagrangian description of fluid motion?

In classical field theories, the Lagrangian specification of the flow field is a way of looking at fluid motion where the observer follows an individual fluid parcel as it moves through space and time. Plotting the position of an individual parcel through time gives the pathline of the parcel.

## What is the difference between Lagrangian and Eulerian?

Lagrangian approach deals with individual particles and calculates the trajectory of each particle separately, whereas the Eulerian approach deals with concentration of particles and calculates the overall diffusion and convection of a number of particles.

## What is Eulerian method?

Eulerian approach (a field approach) Identify (or label) a certain fixed location in the flow field and follow change in its property, as different materials pass through that location.

## How wake is formed?

Wake effects caused by viscosity The wake is the region of disturbed flow (often turbulent) downstream of a solid body moving through a fluid, caused by the flow of the fluid around the body. Parachutes deployed into wakes suffer dynamic pressure deficits which reduce their expected drag forces.

## What is Reynolds transport theorem used for?

The theorem is named after Osborne Reynolds (1842–1912). It is used to recast derivatives of integrated quantities and is useful in formulating the basic equations of continuum mechanics.

## Which of the following is are an Eulerian description of the flow field?

In the Eulerian description of fluid flow, individual fluid particles are not identified. Instead, a control volume is defined, as shown in the diagram. Pressure, velocity, acceleration, and all other flow properties are described as fields within the control volume.