Major losses, also known as frictional losses, occur in pipes due to the viscous effects of fluid and roughness of pipe walls. These losses are associated with the frictional energy lost as fluid flows. There are two types of fluid flow - laminar and turbulent - which have different laws of friction. The Darcy-Weisbach equation can be used to calculate frictional loss. It relates head loss to flow characteristics like velocity, pipe dimensions, fluid properties and roughness.

1. SHRI RAMDEOBABA COLLEGE OF ENGINEERING
AND MANAGEMENT
DEPARTMENT OF CIVIL ENGINEERING
POWERPOINT PRESENTATION
ON
Major losses (Frictional loss)
Assignment 1 :- Fluid Mechanics II (CET 256)
-Presented by: Aman Singh
Civil (SS) K-13

2. Major losses
(Frictional loss)
Here is where your presentation begins

3. Table of Contents
05 06
03
04
01 02
Law of Fluid friction
(i) For laminar
flow
(ii) For turbulent
flow
Darcy-weishbach eqn
Derivation
Major lossses
Explanation
Frictional losses
Explanation
Introduction
Total head loss
Losses
(i) Major loss
(ii) Minor loss

4. Head loss :- Head loss is potential
energy that is converted to kinetic
energy. Head losses are due to the
frictional resistance of the piping system
(pipe, valves, fittings, entrance, and
exit losses). Unlike velocity head, friction
head cannot be ignored in system
calculations
Introduction

5. (i) Minor losses
(ii) Major losses
Losses in pipes

6. Major
losses

7. Major losses are associated with
frictional energy loss that is caused by
the viscous effects of the medium and
roughness of the pipe wall.

8. Frictional
loss

9. The fluid flowing in the pipe is always
subjected to resistance due to shear
forces between fluid particles and the
boundary wall of the pipe and between
the fluid particles themselves resulting
from the viscosity of the fluid. This
resistance to the flow is called frictional
resistance and loss of head due to that
is called frictional losses.

10. Laws of fluid
friction

11. LAWS OF FLUID FRICTIONAL
FOR LAMINAR FLOW.
LAWS OF FLUID FRICTIONAL
FOR TURBULENT FLOW
Laws
(i) (ii)

12. LAWS OF FLUID
FRICTIONAL FOR LAMINAR
FLOW.
The frictional resistance in the laminar flow is –
 proportional to the velocity of flow .
 independent of the pressure .
 proportional to the surface area in contact.
 independent of the nature of surface is contact.

13. LAWS OF FLUID FRICTIONAL
FOR TURBULENT
FLOW
The frictional resistance in the case of turbulent flow is –
 proportional to (velocity).
 independent of pressure .
 proportional to the density of the flowing fluid.
 proportional to the surface area in contact.

14. Darcy Weisbach
Equation

15. Darcy Weisbach
Equation for frictional
loss

16. THANKS
Do you have any questions?
singham_4@rknec.edu
+91 9923100377
Please keep this slide for attribution