GATE 2025 Fluid Mechanics Syllabus (XE-B) gives you details of the latest GATE syllabus for the subject released by the official gate organizing institute IIT Roorkee 2025. We also created an easy-to-use ad-free mobile app for the GATE syllabus, previous year papers with keys, gate calculator, virtual calculator, and more. Download iStudy App for all GATE preparation needs.
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GATE 2025 Fluid Mechanics Syllabus (XE-B)
Section 1: Flow and Fluid Properties
Fluid Properties: Density, viscosity, surface tension, relationship between stress and strain-rate for Newtonian fluids.
Classification of Flows: Viscous versus inviscid flows, incompressible versus compressible flows, internal versus external flows, steady versus unsteady flows, laminar versus turbulent flows, 1-D, 2-D and 3-D flows, Newtonian versus non-Newtonian fluid flow.
Hydrostatics: Buoyancy, manometry, forces on submerged bodies and its stability.
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Section 2: Kinematics of Fluid Motion
Eulerian and Lagrangian descriptions of fluid motion. Concept of local, convective and material derivatives. Streamline, streakline, pathline and timeline.
Section 3: Integral Analysis for a Control Volume
Reynolds Transport Theorem (RTT) for conservation of mass, linear and angular momentum.
Section 4: Differential Analysis
Differential equations of mass and momentum for incompressible flows.
Inviscid flows – Euler equations and viscous flows – Navier-Stokes equations.
Concept of fluid rotation, vorticity, stream function and circulation.
Exact solutions of Navier-Stokes equations for Couette flow and Poiseuille flow, thin film flow.
Section 5: Dimensional Analysis
Concept of geometric, kinematic and dynamic similarity.
Buckingham Pi theorem and its applications.
Non-dimensional parameters and their physical significance – Reynolds number, Froude number and
Mach number.
Section 6: Internal Flows
Fully developed pipe flow.
Empirical relations for laminar and turbulent flows: friction factor, Darcy-Weisbach relation and Moody’s chart.
Major and minor losses.
Section 7: Bernoulli’s Equation and its Applications, Potential Flows
Bernoulli’s equation: Assumptions and applications.
Flow measurements – Venturi meter, Pitot-static tube and orifice meter.
Elementary potential flows: Velocity potential function.
Uniform flow, source, sink and vortex, and their superposition for flow past simple geometries.
Section 8: External Flows
Prandtl boundary layer equations: Concept and assumptions.
Boundary layer characteristics: Boundary layer thickness, displacement thickness and momentum thickness.
Qualitative idea of boundary layer separation, streamlined and bluff bodies, and drag and lift forces.
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GENERAL APTITUDE (Common for all branches)
Verbal Aptitude
Basic English Grammar
Tenses, articles, adjectives, prepositions, conjunctions, verb-noun agreement, and other parts of speech
Basic Vocabulary
Words, idioms, and phrases in context
Reading and Comprehension
Narrative Sequencing
Quantitative Aptitude
Data Interpretation
Data graphs (bar graphs, pie charts, and other graphs representing data), 2- and 3-dimensional plots, maps, and tables
Numerical Computation and Estimation
Ratios, percentages, powers, exponents and logarithms, permutations and combinations, and series
Mensuration and Geometry
Elementary Statistics and Probability
Analytical Aptitude
Logic
Deduction and Induction
Analogy
Numerical Relations and Reasoning
Spatial Aptitude
Transformation of Shapes
Translation, rotation, scaling, mirroring, assembling, and grouping
Paper folding, cutting, and patterns in 2 and 3 dimensions
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