A venturi tube is a tube with a constricted throat that increases velocity and decrease pressure while an Orifice plate is a device which measures the rate of fluid flow. The Venturi Tube and Orifice Plate are basically used to determine flow rate in piping systems. Both of them used the same principle which is Bernoulli’s Equation. Based on Bernoulli’s Equation which says that there is a relationship between the pressure of the fluid and velocity of the fluid. In a flow metering device, the downstream pressure before an obstruction will be higher than the upstream pressure after. The Venturi Tube has less head loss than Orifice Plate due to its streamlined design.

Orifice Plate

Venturi Tube

The objectives of this experiment are ;
* To determine the coefficient of discharge of Venturi tube. * To determine the coefficient of discharge of Orifice plate.

APPARATUS
Ball cocks for shutting off part sections

Back wall
Annular chambers with pressure tapping nipple

Tubular steel frame with suction pads

Double pressure gauge

Inlet (concealed)
Diagram 1
Adjustable measurement system

PROCEDURE

Part A : Flow through Venturi Tube
1. The inlet and throat diameters of Venturi tube were recorded. 2. The Venturi tube into section 6 was fixed as shown in figure 1. 3. All valves were closed except those that will let the water flows from the tank to section Ventori tube and return back to the tank. 4. The manometer hoses to the pressure tapping points of the Venturi tube were connected. 5. The pump was switched on. Air bubbles was removed from the apparatus. 6. The valves on the left side of the Venturi tube were adjusted to a certain point. 7. The values of h1 and h2 were measured and recorded.

8. The actual volume flow rate (Qactual) were measured and recorded. 9. Step 6 to 8 for 5 values of Qactual were repeated.

Part B : Flow through Orifice Plate
1. The inlet and throat diameters...

...FM 2 FLOW ALONG A VENTURI TUBE
Summary
The objectives of the experiment is to study the validity of the Bernoulli equation and to determine the coefficient of discharge, Cd, by calibrating the venturi tube as a flow meter. To investigate the validity of the Bernoulli equation, the static pressure is taken at each tapping and the total head is determined for the maximum difference setting. The velocity head is calculated using the Bernoulli equation. To calculate Cd, the volumetric flow rate is measured for the maximum and minimum settings and for eight intermediate values. From the experimental analysis, it can be deduced that the total head does not remain constant due to frictional losses and experimental errors and thus the Bernoulli equation is not obeyed. The value of Cd calculated from figure is 0.92, close to the actual value, within experimental errors.
Introduction
The flow along a venturi tube is another simple application of Bernoulli’s equation. The principle of the venturi meter was demonstrated in 1971 by the Italian Giovanni Battista Venturi (1746- 1822) but it was not until 1887 that the principle was applied by the American Clemens Herschel (1842- 1930), to a practical instrument for measuring the rate of flow of a fluid. The device consists essentially of a convergence in pipe- line, followed by a short parallel- sided throat and a divergence, called as a diffuser....

...CHARLES DARWIN UNIVERSITY
ENG243 – THE VENTURI METER AND THE ENERGY LINE
1.
Introduction
A Venturi meter is a device for determining the flow-rate of a fluid down a pipe. One measures the
pressure difference between the venturi inlet and neck, and from this the flow-rate can be
determined. The apparatus used on this experiment also has a number of straight tube manometers
at equally spaced intervals. These will be used to determine the hydraulic grade line of the fluid as
it passes through the manometer.
2.
Apparatus and theory of the venturi
A diagram of the Venturi apparatus used for this experiment is show below.
The ideal theoretical (volumetric) flow-rate Q from a venturi meter is given by:
Q = A1
2 g∆H
X 2 −1
(
(1)
)
where A1 is the area of the venturi inlet, g = 9.783 m/s2 local gravitational acceleration, X is the
ration of the area of the venturi inlet to neck, i.e. X = A1/A2. The diameter at the venturi inlet is26
mm and the diameter at the venturi neck is 16 mm. The pressure difference, ∆H expressed as an
elevation change is
∆H = h1 − h2 =
p1 − p 2
γ
(2)
where γ is the specific weight of the fluid in the manometer.
When real world effects such as fluid friction and turbulence are included its is found that equation
(1) is not obeyed exactly. A correction factor,...

...Hydraulics Laboratory Experiment Report
Name:
Ahmed Essam Mansour
Section: "1", Monday 2-5 pm Title: Date: Venturi Meter and Orifice Meter 6 November, 2006
Objectives:
• To use the Venturi Meter and the Orifice Meter to measure the rate of discharge. • To determine the coefficient of discharge Cd for both the Venturi Meter and the Orifice Meter.
Theory:
A Venturi meter and an Orifice are both instruments used for measuring the rate of discharge for a fluid flowing in a pipe. These instruments are based on the same principle which states the following: "The pressure difference between any two points on a tapering pipe through which the fluid is flowing depends on the change of levels and on the change in velocities and therefore on the volume rate of flow" Where the flow is led to narrow cross section, at which the velocity increase and hence a fall in the pressure occur. A Venturi Meter consists of a short converging conical tube leading to a cylindrical portion, called the throat, of smaller diameter of that of the pipeline, which is followed by a diverging section in which the diameter increases again to that of the main pipeline
An Orifice Meter consists of an orifice plate which has an opening in it smaller than the internal diameter of the pipeline, placed in a flange connecting the two portions of the pipeline.
The equation to be used to fine Q theoretical for the pipe line...

...The Vanna Venturi House Essay
Robert Venturi’s early design; the Vanna Venturi House, has been a reference for contemporary architecture. His domestic masterpiece challenged the definition of modern architecture.1 It seems the Vanna Venturi House contradicted many of the rules that modern architects were expected to follow. This essay will discuss the architectural qualities of the Vanna Venturi House and the precedents which influenced its design.
Robert Venturi was only thirty-four when he was requested by his mother to design and build a house for her. Up until this time all of Venturi’s designs had been mostly theoretical. He was now given a chance to make them concrete.2 It could be understood that Robert’s mother’s house was designed to help him with his career; he was given an opportunity to design and construct a building instead of writing and teaching about them. The Vanna Venturi House was to be Robert Venturi’s first building. Like many architects he was driven to test his ideas through construction.3 The house went through six basic schemes and six models were made to clearly exhibit the form of the house and Venturi’s evolving ideas.4
Vanna’s house was to be Venturi’s first building. However, the design took so long that another building was constructed first, the North Penn Visiting Nurses’ Association Headquarters in Pennsylvania (completed in 1961). While the North...

...XAVIER UNIVERSITY – ATENEO DE CAGAYAN
COLLEGE OF ENGINEERING
ACTIVITY NO. 4
VENTURI METER
Date Performed: December 02, 2014
ChE 34 A: UNIT OPERATIONS LAB
Submitted by:
Ephrem John O. Agorob
201030788
Jill Carlotha P. Cajote
201030149
Jacqueline Faye D. Lim
201030739
Melody Kimberly D. Pitoc
201014465
Instructor:
Engr. Edwin Richard R. Ortiz
Date Submitted: December 09, 2014
1
VENTURI METER
Experiment 4
ABSTRACT: Venturi meter is a tube that measures the flow rate of fluids in the pipeline by increasing
the velocity and decreasing the pressure as it passes through the throat. In this activity, the coefficient
of discharge (CD) of the venturi meter was identified by series of trial which measures the flow rate and
pressure drop of water at 1/2, 1/4 and 1/8 opening of the pipe. The CD of each opening that were obtained from calculation were 0.8536, 0.6112 and 0.1062 respectively. Errors from the experiment were
mostly caused by low flow rate which resulted to low Reynolds number of the fluid. The results also
showed that the greater the Reynolds number of the fluid, the greater the CD.
KEYWORDS: venturi meter, coefficient of discharge, Reynolds number
INTRODUCTION
For several operations in industrial plants, there is a
critical need to measure the liquid flow rate. Failure to
take accurate flow measurements can cause disastrous
results and can fail an operation. That is why several...

...Idiosyncratic Differences Between the Eames House and the
Vanna Venturi House: A Case Study
Kyuho Ahn
University of Oregon, Oregon, USA
In architectural fields, it is often unclear where to draw the line between Modernism and Postmodernism that often
represent political debates between the ideology of orthodox modernity and the anti-ideology movement against
Modernism as a social and political movement, because architectural forms result from complex and multi-layers
problem solving. This paper argues that a particular architectural style or vocabularies in these two eras could be
described as architects’ idiosyncratic aesthetic tastes. Therefore, this study reveals two different architectural styles
of two renowned architectural designs, the Eames House and the Vanna Ventri House that each represents
Modernism and Postmodernism. This paper demonstrates that Eames’ ideal image of home is depicted within a
universal vocabulary and that Venturi’s idiosyncratic interest, curiosity of historical contexts, is revealed in a new
neoclassical appearance in Mannerist manner. Also, this study reveals that the idea and presentation of the
Eameses’ house, representing their “love of objects”, is not only related to Venturi’s idea of complexity and
contradiction, but also depicts a historical connection by “functioning decoration” for “extra cultural surprise”.
Keywords: Modernism, Postmodernism, the Eames House, the Vanna Venturi House, architectural...