A one-dimensional flow is one in which _______

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SSC JE ME Previous Paper 11 ( Held on: 4 March 2017 Evening)
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  1. Is uniform
  2. Is steady uniform
  3. Takes place in straight lines
  4. Involves zero transverse components of flow

Answer (Detailed Solution Below)

Option 4 : Involves zero transverse components of flow
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Explanation:

A one-dimensional flow is one which involves zero transverse components of flow.

Uniform flow

The flow is defined as uniform flow when in the flow field the velocity and other hydrodynamic parameters do not change from point to point at any instant of time. For a uniform flow, there will be no spatial distribution of hydrodynamic and other parameters.

Non-uniform flow

When the velocity and other hydrodynamic parameters change from one point to another the flow is defined as non-uniform.

Steady flow

steady flow is defined as a flow in which the various hydrodynamic parameters and fluid properties at any point do not change with time.

One-dimensional flow 

It is the flow where all the flow parameters may be expressed as functions of time and one space coordinate only. The single space coordinate is usually the distance measured along the center line (not necessarily straight) in which the fluid is flowing. Example: the flow in a pipe is considered one - dimensional when variations of pressure and velocity occur along the length of the pipe, but any variation over the cross-section is assumed negligible.

Turbulent fluid motion 

It can be considered as an irregular condition of flow in which various quantities (such as velocity components and pressure) show a random variation with time and space.

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