Czech Technical University in Praha

Faculty of Mechanical Engineering
Department of Fluid Mechanics and Power Engineering


Division of Fluid Mechanics and Thermodynamics

Subject

"FLUID MECHANICS"

Professor Vaclav TESAR



EXAMINATION REQUIREMENTS

[A] BASIC RELATIONS

1) Castelli Theorem: equation, application, consequences
2) Bernoulli's Theorem: equation - different versions, integration, application, consequences
3) Quantities and their symbols: intensity quantities, extensity quantities - specific values, flowrate values

[B] HYDROSTATICS

1) Evaluation of pressure at a point in stagnant fluid
2) Liquid-filled manometers, principle, basic variants
3) Hydrostatic force on plane wall (horizontal and inclined) - magnitude, position of the centre of pressure
4) Hydrostatic force on curved wall: substitution plane method
5) The concept of capacitance, expression for prismatic vessels

[C] PRINCIPLES OF HYDRODYNAMICS

1) Kinetic energy, its use in the Bernoullis' Theorem
2) Piezzometric velocity probes: Pitot tube, Prandtl tube
3) Flow through tubes with varying cross sections; Venturi meter
4) Discharge of liquid from vessels into atmosphere. Weirs
5) Discharge through submerged orifices, Imperfect weirs

[D] LOSSES

1) The loss (dissipation) coefficient, its meaning and use
2) Viscosity: definition, meaning, use. Variation with temperature (liquid, gas)
3) Friction loss, calculation in laminar and turbulent regime
4) Local loss. Disipance

[E] UNSTEADY FLOW

1) Inertial term in the Bernoullis' Theorem, integration, applications
2) Inertance, its meaning and use

[F] RELATIVE MOTION

1) Bernoullis' Theorem for flow with work done by motion of the pipe
2) Calculation of pressure in vessels in translational and rotational motion
3) Basic principles of a centrifugal pump and a radial turbine

[G] HYDRAULIC SYSTEMS

1) Basic laws: conditions in a node and a loop
2) Parallel and series resistance connection, expressions, graphical solutions
3) Basic loop with a source (pump) and load
4) Transition process: dicharge from a prismatic vessel
5) Connected vessels: transition process of reaching equal surface heights
6) Transition processes in systems with inertia

[H] CONTROL VOLUME METHOD

1) Derivation of the force balance equation
2) Force generated by flowing fluid on a pipeline element
3) Derivation of the Borda loss formula
4) Force generated by impact of a jet

[I] SHEAR REGIONS

1) Derivation of the flow through a narrow gap
2) Derivation of flow down a vertical wall
3) The Prandtl's agebraic turbulence model
4) Basic concepts of turbulent boundary layer and turbulent submerged jet

[J] FLOW PAST BODIES

1) Drag force acting on a body: definiciton of drag coefficient. Pressure and friction drag components
2) Lift; lift coefficient. Polar diagram
3) Basic principles of flow past blunt bodies

Vaclav TESAR : "FLUID MECHANICS"
Any comments and suggestions concerning this text may be mailed to the author to his address tesar@fsid.cvut.cz

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Last change : 18.05.1998