Presentation of the most basic concepts, laws and methods of description of stagnant and flowing liquids and gases. Typing, modeling and introducing the solution processes of real systems in technical practice.
Fluid Mechanics (GAGEBAN-ARAMLAST-2)
Basic data
Name and type of the study programme
Mechanical Engineering, undergraduate program
Curriculum
2026
Classes / consultation hours
1 + 2 + 0 (L+S+Labs)
Credits
3 credits
Theory – Practice
Theory: 33%, Practice: 67%
Recommended semester
Semester 4
Study mode
full-time
Prerequisites
Evaluation type
Colloquium
Course category
Compulsory
Language
English
Instructors
Responsible instructor
Dr. Nagy Péter
Responsible department
Department of Basic Sciences
Instructor(s)
Checked by
Dr. Líska János
Course objectives
Course content
Lectures
Stationary liquids and gases: Physical characteristics of liquids and gases. Pascal's law. Compressibility of liquids. The force field of difficulty and inertia. Behavior of the resting fluid. The free surface of the liquid. Fluid pressure in gravity field. Archimedes' law. The fluid is in an inertial force field. Tension in the pipe wall. Flow of frictionless liquids and gases: Description of flowing liquids. Average speed, volume flow, mass flow. The continuity theorem. Power requirement for flow. The amount of motion and the Euler equation. The Bernoulli equation and its technical applications: Pitot tube, Prandtl tube. Venturi, water air pump, liquid spray. Momentum and its application to fluid contained in a stream tube. The force of the free jet on a plane. The flat-bladed water wheel, the Pelton wheel. Flow of frictional liquids and gases: Internal friction. Newton's law of viscosity. The Reynolds experiment and the Reynolds number. Layered and billowing flow. Boundary layer theory. Slip on oil film. The unloaded plain bearing. Layered flow in a cylindrical tube: the Hagen-Poiseuille law. Friction loss of billowing flow in cylindrical tube: surface roughness, tube friction factor. Forces acting on circulating solids. Elements of wing aerodynamics. Movement of ships in the water. Similarity of flows. Numerical finite-element methods of fluid dynamics.
Seminars
Calculation exercises related to the current theoretical material.
Acquired competences
Knowledge
–
Skills
–
Attitude
–
Autonomy and responsibilities
–
Requirements, evaluation and grading
Mid-term study requirements
Writing one short paper at unannounced time. A pocket calculator can be used for dissertation writing, as well as a flat, double-sided (A4 size) collection of formulas in your own handwriting (not photocopied, not printed). The time available for its elaboration is 45 minutes, the maximum points that can be obtained is F = 50. This paper cannot be replaced or repaired. There is no score requirement for admission to the exam.
Exam requirements
Writing an exam paper (50 points). Score obtained with mid-semester paper (F) 50 points Score obtained with exam (V) 50 points P point is calculated from F test-points and V exam-points by: P=106,5-sqrt(125*(50,3125-F-V+F*V/50)) Grade is determined based on P score points in accordance with the current study regulations.
Generative AI usage
Use of GAI tools is not permitted for solving assignments. This means GAI tools cannot be used to complete formative or summative assessments, and using GAI constitutes academic misconduct. The use of AI tools for spelling and grammar checking does not fall under this prohibition.
Study aids, laboratory background
Downloadable resources.
Readings
Compulsory readings
Y. A. Cengel, J. M. Cimbala: Fluid Mechanics, McGraw-Hill, 2006, ISBN 0–07–247236–7 (web: https://sv.20file.org/up1/643_0.pdf)
Recommended readings
C. Pozrikidis: Fluid Dynamics. Springer Verlag, 2009. (ISBN 978-1-4899-7990-2)