1. Government College Of Engineering,
Aurangabad.
By:-
Nikhil Pakwanne
1

3. What Is Kinematics Of Fluid?
 Fluid Kinematics is the study of fluid in
motion where pressure forces are not
considered.
It is generally a continuous function in
space and time.

4.  Lagrangian Method:-
 Describes a defined mass (position,
velocity, acceleration, pressure,
temperature, etc.) as functions of
time.
 Ex:- Track the location of a
migrating bird.

5. Eulerian Method :-
Describes the flow field
(velocity, acceleration, pressure,
temperature, etc.) as functions of
position and time.
Ex:- Count the birds passing a
particular location.

6.  Types Of Fluid Flow:-
1) Steady & Unsteady Flows.
2) Uniform & Non-uniform Flows.
3) Laminar & Turbulent Flows.
4) Compressible & Incompressible Flows.
5) Rotational & Irrotational Flows.
6) One , Two & Three Dimensional
Flows.

7.  Steady & Unsteady Flows:-
 Steady Flows:-
 In which the fluid Characteristics
Like velocity, pressure, density , etc.
At a Point do not change with time.

8.  Unsteady Flow:-
In which the fluid
velocity , pressure
or density at a
point changes
with respect to
time.
Changing in time

9.  Uniform & Non-uniform
Flow :-
Uniform Flow:-
In which the velocity at given time
does not change with respect to space
( length of direction of the flow ).

10. Non-Uniform
Flow:-
In which the
Changing in space
velocity at any
time changes with
respect to space.

11.  Laminar Flow:-
 in which the
fluid particles
move along well
defined paths or
stream line.
Fig. Laminar Flow

12. Turbulent Flow:-
 fluid moves in very
irregular paths or zig
–zag Way.
efficient mixing.
velocity at a point
fluctuates.
Fig. Turbulent Flow

13. Compressible & Incompressible Flows:-
Compressible Flows:-
In which the density of the fluid changes
from point to point.
The density is not constant for the fluid.
Incompressible Flows:-
 In which the density of fluid changes from point to
point.
 the density is constant for the fluid.

14. Rotational & Irrotational Flows:-
Rotational Flows :-
In which the fluid particles while flowing
along stream lines, Also rotate about their
own axis.
Irrotational Flows:-
In which the fluid particles while flowing
along stream lines, do not rotate about their
own axis.

15.  One , Two & Three Dimensional
Flows:-
 One Dimensional Flow:-
In which the flow parameter
such as velocity is a function of
time and
one space co-ordinate only.

16.  Two Dimensional Flows:-
In which the velocity is a
function of time and
two rectangular space
co-ordinates.

17.  Three Dimensional Flows:-
In which the velocity is the
function of time and
Three mutually perpendicular
directions.

18. Flow Visualization:-
Flow Visualization is the visual examination of
flow-field features.
Important for both physical experiments and
Numerical Solutions.
Numerous Methods:-
1) Streamlines.
2) Pathlines.
3) Streaklines.

19. Streamline:-
A Streamline is a curve that is everywhere
tangent to the instantaneous local
velocity vector.
It has the direction of the velocity vector
at each point no. of flow across the streamline.

20. steady flow
streamlines are
fixed in space.
 But, unsteady
flow
streamlines
moves. Fig. Streamline

21. Pathline:-
A Pathline is the actual path travelled
by an individual fluid particle over
some time period.
Same as the fluid particle's material
position vector .

22.  And the path of a particle same as
Streamline for Steady Flow.
Fig. Pathline

23. Streakline:-
A streakline is the locus of fluid
particles that have passed sequentially
through a prescribed point in the flow.
Easy to generate in experiments like
dye in a water flow, or smoke in an
airflow.

24.  And a tracer
injected
continuously into
a flow.
 same as pathline
and streamline
for steady flow.
Fig.Streakline

25. FLUID
MECHANICS BY
BANSAL
http://en.wikipedia.org

26. Appreciate
your time and attention!