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Fluid Mechanics

Fluid Mechanics for GATE Mechanical and Civil Engineering, one topic per lesson: the theory in plain words, the formulas, a solved example, and GATE-style questions (MCQ, MSQ and NAT) whose numerical answers are recomputed by a program when the site is built.

Start the first lesson

1Fluid Statics

  1. Fluid Properties, Pressure and ManometersDensity, viscosity and Newton's law of viscosity, surface tension and capillarity, hydrostatic pressure, gauge and absolute pressure, and manometer problems with solved examples.
  2. Hydrostatic Forces, Buoyancy and StabilityTotal pressure and centre of pressure on plane and curved surfaces, buoyancy and Archimedes' principle, metacentric height and stability of floating bodies.

2Fluid Dynamics

  1. Fluid Kinematics, Bernoulli and MomentumTypes of flow, continuity equation, streamlines and stream function, velocity potential, Bernoulli's equation, venturimeter and Pitot tube, and the momentum equation for jets and bends.
  2. Viscous Flow and Flow Through PipesReynolds number, laminar flow in pipes and between plates (Hagen-Poiseuille), Darcy-Weisbach friction, Moody chart, minor losses, and pipes in series and parallel.

3External Flow and Similarity

  1. Boundary Layer, Drag and Dimensional AnalysisBoundary layer thickness, laminar and turbulent boundary layers, separation, drag and lift, Buckingham pi theorem, important dimensionless numbers and model similarity.

4Turbomachinery

  1. Turbines and PumpsImpulse and reaction turbines (Pelton, Francis, Kaplan), Euler's turbomachine equation, velocity triangles, efficiencies, specific speed, centrifugal pump head, NPSH and cavitation.