Course title:

Fluid Mechanics

Primary programme:

Fizikus mérnök BSc

ECTS credits:

6

Course type:

elective

Number of lectures per week:

2

Number of practices per week:

2

Number of laboratory exercises per week:

1

Further knowledge transfer methods:

laboratory measurements

Grading:

Coursework grade

Special grading methods:

laboratory reports, laboratory presentations

Semester:

5

Prerequisites:

Mechanics, Multivariable Calculus

Responsible lecturer:

Dr. János Gábor Vad, university professor, DSc., habil.

Lecturers and instructors:

Course description:

Students will acquire knowledge related to the flow, knowledge and description of liquid / gaseous media that is important for technical application. Building on these, it introduces students to solving technical tasks related to the flow of media through laboratory and classroom exercises. Particular emphasis will be placed on measurement techniques related to flow measurement, flow processes in machines, equipment and pipelines. Students report on the acquisition of theoretical knowledge and their skills in its practical application in the mid-term practical problem-solving and applied theoretical dissertations, as well as in laboratory measurements. The course prepares students to recognize and solve flow problems in their engineering work, and enables them to take on more complex tasks based on the acquired knowledge through self-study.
- Knows Newton’s law of viscosity; the peculiarities of Newtonian fluids and the rheological curve of
characteristic non-Newtonian fluids, the basics of the Lagrange and Euler methods of description, basic
fluidological concepts.
- Oriented the characteristic ranges of gas, superheated / saturated steam, liquid medium on the pressure-specific volume diagram; the ideal gas law; the tension curve of water; the phenomenon and countermeasures of cavitation erosion.
- The student is aware of the basic equation of hydrostatics; conditions for its validity and simplification, the continuity equation; conditions for its validity and simplification.
- Understands the Euler equation and the conditions for its application; interpretation of local and convective acceleration, the Bernoulli equation; conditions for its validity and simplification; the concepts of static, dynamic, and total pressure, their relationships.
- The student recalls Thomson (Lord Kelvin), Helmholtz I. and II. vortex theorem, its consequences, the integral momentum theorem; conditions for simplification, Alievi’s theory; the resulting pressure rise relationship.
- The student knows the Reynolds experiment, the Reynolds number and its illustrative meaning, the characteristics of laminar and turbulent flows, the concept and main features of the boundary layer, the conditions and countermeasures of the boundary layer detachment.
- Informed regarding the pipe friction coefficient of laminar pipe flow; its derivation, the basics of dimensional analysis, the conditional system of flow similarity, for constant as well as variable density.
- The student is aware of the equation of motion of friction media, Navier-Stokes equation, Bernoulli equation extended with the loss term, hydraulic characterization of elements, Nikuradze and Moody diagram; the concept of hydraulically smooth and rough pipes.
- Understands the energy equation; validity and simplification conditions, sound propagation rate, Mach
number definition, critical temperature, density, and pressure ratio, simple tank orifice outflow, Laval nozzle characteristics.
- Understands the components of the force acting on a body placed in flow; the concept of blunt and
streamlined bodies; the aerodynamic force and force factor components.

Reading materials:

Tamás Lajos: The basics of fluid dynamics. 2015, ISBN 978 963 12 2885 4.

List of competences:

Please find the detailed list, as quoted from the Hungarian training and outcome requirements of the Physicist Engineer program, in the Hungarian version of the course description.