To find pressure drop in horizontal straight pipe and compare their results theoretically, with an Ansys software.

1. COMSATS UNIVERSITY ISLAMABAD
WAH CAMPUS
PROJECT FLUID MECHANICS
SUBMITTED BY:
HUMAYOUN MALIK
(FA19-BME-022)
MUHAMMAD SULEMAN RUBBANI
(FA19-BME-031)
SECTION:
5A
SUBMITTED TO:
SIR ABUZAR JAMIL

2. PROBLEM:
To find pressure drop in horizontal straight
pipe and compare their results theoretically,
with an Ansys software.
Solution:
We take dimension of our horizontal
straight pipe as follows:
Length=15cm
Diameter=2.5cm
Velocity=0.040m/s
Reynolds Number:
The Reynolds number is the ratio of inertial
forces to viscous forces. The Reynolds
number is a dimensionless number used to
categorize the fluids systems in which the
effect of viscosity is important in controlling
the velocities or the flow pattern of a fluid.

3. For a laminar flow:
F=64/Re
Relation for finding the pressure
drop
Simply put, pressure drop is the difference
in total pressure between two points in a
fluid-carrying network. When a liquid
material enters one end of a piping system,
and leaves the other, pressure drop, or
pressure loss, will occur. Pressure drops in

4. and of itself is not necessarily bad
From Bernoulli Equation
Assumption
V1=V2
Z1=Z2(datum line)
Minor head loss=0
ΔP= γ.(Headloss)
STEPS OF WORKING MODLE OF
ANSYS:
GEOMETRY
MESH
SETUP
SOLUTION
RESULTS

5. GEOMETRY
From analysis system we select fluid
flow (FLUENT)
Fluent means water is continuously
moving in pipe and capable of moving
water in pipe.
First, we define geometry of our pipe. So,
we select geometry option.
In unit option we select meter units.
In software, Tree outline toolbox, we
select XY plane because we can work in
2D and select option look at face/plane.
After this we open sketching option. In
draw option we select rectangle.
After draw rectangle we open dimension
option and set our dimension according
to our problem statement.
We set H1horizontal height of pipe and

6. v1 vertical height of pipe.
After this we need to create surface from
sketches from concept option.
We create surface 1. In base object we
apply and create surface 1. Click
generate to create surface 1.
Select filter edges and create all sides of
pipe. E.g top wall, axis, inlet, outlet.
Geometry is completed.

7. Meshing
1)In mesh we open insert option and
selecting sizing and select edge.
2)In last we select face meshing and pipe
is divided into equal portion of small
objects.
3)At last, in mesh setup, we click update.

8. Setup
1) In general, we select some basic options.
 Pressure based
 Steady
 Axis symmetric
 Absolute

9. 2) In materials, from fluent database we
select properties of water.
3) Then click change/create and close.
4) In cell zone condition, select water-liquid.
5) In boundary conditions, we assign initial
values.
6) In Solution, Click monitor option and
then click residual print, plot option. In this
option set numbers of iterations store in
this simulation.
7) In solution initialization, Click initializes
hybrid initialization.
8) In run calculation, enter number of
iterations 1000 and then click calculate.
9) Our solution is converged at 100
iterations.
10)In result, Click Graphics and then click
contours and tick the filled option.
11)Then in plot option, Click XY and then

10. click axis.
SOLUTION
1) After Setup, we go to next set
named as solution, where we Click on
Graphics and then click contours and

11. tick the filled on.
2) Then in plot option, Click XY and
then click axis.

12. Results
1) Select XY plane and then click contour
and then click Ok.
2) In location toolbar, select periodic 1
and then apply.

13. THE END