fluid mechanics fluid flow rate measurements so How do you measure flow rate in a lab? A pitot tube is used to measure fluid flow velocity. The tube is pointed into the flow and the difference between the stagnation pressure at the tip of the probe and the static pressure at its side is measured, yielding the dynamic pressure from which the fluid velocity is calculated using Bernoulli's equation. A flow meter (or a flow sensor) is a flow instrument that is used to indicate the amount of liquid, gas, or vapor moving through a pipe or conduit by measuring linear, non-linear, mass, or volumetric flow rates. The HM 150 series of devices permits a varied experimental cross-section in the fundamentals of fluid mechanics. The base module HM 150 provides the basic equipment for individual experiments: the supply of water in the closed circuit; the determination of volumetric flow rate and the positioning of the experimental unit on the working surface of the base module and the collection of dripping water. The closed water circuit consists of the underlying storage tank with a powerful submersible pump and the measuring tank arranged above, in which the returning water is collected. The measuring tank is stepped, for larger and smaller volumetric flow rates. A measuring beaker is used for very small volumetric flow rates. The volumetric flow rates are measured using a stopwatch. The top work surface enables the various experimental units to be easily and safely positioned. A small flume is integrated into the work surface, in which experiments with weirs (HM 150.03) are conducted.

1. Koya university
faculty of engineering
Chemical engineering department
Fluid mechanics
Flow Rate Measurement
2022-2023
Prepared by : supervised by:
Dima Jawhar Mustafa Ms. Lameha A. Ali
Sntia Louay sba Mr. Daban Luqman
Srwa Tahir
Rayan Hawez
Danya Amir
experiment date : 22/Feb.2023 Submitting date : 1/ Mar. /2023

2. 2
Table of Contents
Aim : .................................................................................................................................................................... 3
Introduction :....................................................................................................................................................... 3
Procedure :.......................................................................................................................................................... 4
Procedure of The Experiment.............................................................................................................................. 5
data collection from the experiment :.................................................................................................................. 5
Calculations : ...................................................................................................................................................... 6
Discussions:......................................................................................................................................................... 6
references :.......................................................................................................................................................... 7

3. 3
Aim :
Measuring Fluid flow rate and to study the volumetric Flow Rate (Q), Mass Flow Rate (ṁ), Wight
rate W.
Introduction :
The HM 150 series of devices permits a varied experimental cross-section in the fundamentals of
fluid mechanics. The base module HM 150 provides the basic equipment for individual experiments:
the supply of water in the closed circuit; the determination of volumetric flow rate and the
positioning of the experimental unit on the working surface of the base module and the collection of
dripping water.
The closed water circuit consists of the underlying storage tank with a powerful submersible pump
and the measuring tank arranged above, in which the returning water is collected.
The measuring tank is stepped, for larger and smaller volumetric flow rates. A measuring beaker is
used for very small volumetric flow rates. The volumetric flow rates are measured using a stopwatch.
The top work surface enables the various experimental units to be easily and safely positioned. A
small flume is integrated in the work surface, in which experiments with weirs (HM 150.03) are
conducted.
You can calculate the volumetric flow rate by using the equation shown below:
Q=
𝑽𝒐𝒍𝒖𝒎𝒆
𝒕𝒊𝒎𝒆
m= ρ.Q W=mg W= ρ.Q.g

4. 4
Procedure :
Base module for experiments in fluid mechanics
Figure-1 : HM 150.
1- Volumetric measuring tank with channel 2-Remote sight gauge
3- Sliding valve 4- Sump tank
5- Drain cock 6- Submersible motor driven pump
7- Water supply for accessories with pump 8- Flow control valve
9- Overflow pipe 10- Switch box
11- Discharge cap 12- Water supply connection for accessories
without pump
emptying the measuring sump tank-4 measuring tank level indicator Remote sight gauge -2
,measuring tank
1. base module for supplying experimental units in fluid mechanics
2. closed water circuit with storage tank, submersible pump and measuring tank
3. measuring tank divided in two for volumetric flow rate measurements
4. measuring beaker with scale for very small volumetric flow rates

5. 5
5. measurement of volumetric flow rates by using a stopwatch
6. work surface with integrated flume for experiments with weirs
7. work surface with inside edge for safe placement of the accessory and for collecting the
dripping water
8. storage tank, measuring tank and work surface made of GRP.
Procedure of The Experiment
1. Turn on the pump in the Switch box -10.
2. start the stop watch to zero.
3. Turn on the Flow control valve -8 then open the sliding valve 3
4. Close the sliding valve at the bottom of the volumetric tank, wait until the liquid reaches a
value of 10 liters and at the same start the watch.
5. Change the flow rate by the Flow control valve -8 because of the Submersible motor
driven pump -6.
6. then open the sliding valve After the liquid reached a value of 20 liters stop the watch.
7. Read off and note the measurement time and the high value of water I tank repeat the
steps then record the results each by adding 10Liters
data collection from the experiment :
Volume Time (sec)
10 96
10 21
10 14
10 10

6. 6
Calculations :
Q=
𝑽𝒐𝒍𝒖𝒎𝒆
𝒕𝒊𝒎𝒆
𝟏𝟎∗𝟏𝟎^(−𝟑)
𝟗𝟔
= 𝟏. 𝟎𝟒𝟐 ∗ 𝟏𝟎(−𝟒)
𝒎𝟑/𝒔
m= ρ.Q =1000* 𝟏. 𝟎𝟒𝟐 ∗ 𝟏𝟎(−𝟒)
=0.1042 kg/s
W=mg= 0.1042*9.81= 1.022 N
W= ρ.Q.g = 1000* 𝟏. 𝟎𝟒𝟐 ∗ 𝟏𝟎(−𝟒)
*9.81= 1.022N
Q=
𝑽𝒐𝒍𝒖𝒎𝒆
𝒕𝒊𝒎𝒆
𝟏𝟎∗𝟏𝟎^(−𝟑)
𝟐𝟏
= 𝟒. 𝟕𝟔𝟏𝟗 ∗ 𝟏𝟎(−𝟒)
𝒎𝟑/𝒔
m= ρ.Q =1000* 𝟒. 𝟕𝟔𝟏𝟗 ∗ 𝟏𝟎(−𝟒)
=0.47619 kg/s
W=mg= 0.47619 *9.81= 4.671 N
W= ρ.Q.g = 1000* 𝟒. 𝟕𝟔𝟏𝟗 ∗ 𝟏𝟎(−𝟒)
∗9.81= 4.671N
Q=
𝑽𝒐𝒍𝒖𝒎𝒆
𝒕𝒊𝒎𝒆
𝟏𝟎∗𝟏𝟎^(−𝟑)
𝟏𝟒
= 𝟕. 𝟏𝟒𝟐𝟖 ∗ 𝟏𝟎(−𝟓)
𝒎𝟑/𝒔
m= ρ.Q =1000* 𝟕. 𝟏𝟒𝟐𝟖 ∗ 𝟏𝟎(−𝟓)
=0.07142 kg/s
W=mg= 0.07142 *9.81= 0.0071 N
W= ρ.Q.g = 1000* 𝟕. 𝟏𝟒𝟐𝟖 ∗ 𝟏𝟎(−𝟓)
*9.81= 0.007N
Q=
𝑽𝒐𝒍𝒖𝒎𝒆
𝒕𝒊𝒎𝒆
𝟏𝟎∗𝟏𝟎^(−𝟑)
𝟏𝟎
= 𝟎. 𝟎𝟎𝟏 𝒎𝟑/𝒔
m= ρ.Q =1000* 𝟎. 𝟎𝟎𝟏 =1 kg/s
W=mg= 1*9.81= 9.81 N
W= ρ.Q.g = 1000* 𝟎. 𝟎𝟎𝟏 ∗9.81= 9.81N
Discussions:
1. Draw the relation between Q & m
 , then find the slop of the relation.
2. Draw the relation between Q & W
 , then find the slop of the relation.
3. What do you understand by the slops above?

7. 7
references :
1. gunt.de,(2020), HM 150 Base module for experiments in fluid mechanics.[online] available :
https://www.gunt.de/en/products/fluid-mechanics/physical-principles/principles-of-
hydrostatics/base-module-for-experiments-in-fluid-mechanics/070.15000/hm150/glct-1:pa-
148:ca-777:pr-547 [accessed: 22/Feb./2023]
2. Waliczek, S. and Raddatz, U., 2010. Sandvik's HM 150 roller in action on the world's largest
conveyor bridge in the Lusatia region; Sandvik HM 150 auf der weltgroessten
Foerderbruecke in der Lausitz im Einsatz. World of Mining-Surface and Underground, 62.
available : https://gunt.de/images/datasheet/547/HM-150-Base-module-for-experiments-in-
fluid-mechanics-gunt-547-pdf_1_en-GB.pdf [accessed: 22/Feb./2023]
3. Esenssys,(Apr 15, 2021), Measuring air velocity and flow rate,[online]. available :
https://esenssys.com/air-velocity-flow-rate-measurement/ [accessed: 22/Feb./2023]
4. Fao,(2019), estimates of water flow: flow rate measurements.[online]. available :
https://www.fao.org/fishery/docs/CDrom/FAO_Training/FAO_Training/General/x6705e/x67
05e03.htm#:~:text=To%20calculate%20the%20water%20flow,average%20depth%20(in%20
m).&text=Water%20flow%20%3D%200.425%20m%2Fs%20x,second%20(l%2Fs)
[accessed: 22/Feb./2023]