Experimental Mechanics of Fluids

Holders: Assist. Prof. Bobovnik Gregor, Assoc. Prof. Kutin Jože

Subject description


It is recommendable for students to have basic knowledge in fluid mechanics and dynamics, and thermodynamics. This makes following of the lectures easier.

In order to pass the course successfully the students are advised to regularly attend the lectures, study additional theoretical backgrounds as preparation for laboratory exercises and to actively participate at those exercises.

Content (Syllabus outline):

Review, basic physical principles and limitations of measurement methods in experimental fluid mechanics, with emphasis on:

  • Measurement of physical and transport properties of fluids (density, viscosity)
  • Measurement of irreversible energy losses in fluid flow (pressure losses)
  • Measurement of local velocities in fluid flow (Pitot tube, thermoanemometry, LDA)
  • Measurement of the integral flow rate of fluids (definitions of flow rate, overview of primary and secondary measurement methods)
  • Static and dynamic installation effects on flowmeters (effects of velocity profile, pulsating flow)

Objectives and competences:

Purpose of the course is that students learn about physical-theoretical backgrounds and practical limitations of measurement methods and systems for an experimental study of fluid flow – measurements of fluid properties, pressure losses, and fluid velocity and flow rate. The course will also focus on particularities of different measurement methods, which are important for their proper selection in practice. The course consists from lectures and laboratory exercises.


  • Comprehension of particularities of measurement methods in the field of experimental fluid mechanics.
  • Capability to select proper measurement methods for fluid properties, pressure losses, and fluid velocity and flow rate.
  • Capability to design measurement systems for fluid flow rate, which depends on different criteria (target measured quantity: mass or volume flow rate, type of fluid: liquid or gas, stationary on dynamic flow conditions, installation limitations, etc.).
  • Comprehension of critical factors that have influence on the quality of measurement results.
  • Capability to evaluate measurement uncertainty.

Intended learning outcomes:

Knowledge and understanding

The students acquire the knowledge about fundamental principles and particularities of measurement methods in the field of experimental fluid mechanics. They are capable to select among different methods, design measuring systems and evaluate the measurement results.


The students will apply the gathered knowledge in different courses in the field of heat and process engineering. The knowledge will be applied also in their future practice when dealing with measurement of fluid flow properties and during the process supervision and control.


The students are able to generalise the basic knowledge and to understand the wider context of measurement systems and their use in different fields. The students will be able to successfully apply their knowledge to understand other technical topics.

Transferrable skills – related to more than one course

Using domestic and foreign literature, understanding the specifications of measurement sensors and equipment. The ability to identify and solve problems in the field of metrology, critically evaluate and analyse them.

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