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2025-2026 College Catalog
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ENG 219 - Fluid Mechanics 3 Contact Hours, 3 Credits 3 lecture periods 0 lab periods
Introduction and fundamental concepts of fluid dynamics and fluid statics. Includes basic equations for a control volume, fluids in motion, inviscid flow, dimensional analysis, flow in pipes and ducts, and boundary layers.
Prerequisite(s): ENG 210 and MAT 241
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Course Learning Outcomes
- Explain the fundamental concepts and terminology in fluid mechanics such as: continuum assumption, velocity and stress fields, viscosity, and Newtonian and non-Newtonian fluids.
- Describe a fluid flow situation using timelines, pathlines, streamlines, streaklines, and important dimensionless numbers such the Reynolds number and the Froude number, including classification of flow fields as inviscid/viscous, laminar/turbulent, internal/external, incompressible/compressible.
- Apply equations of fluid mechanics to the special case of static situations and/or rigid body motion, to fluid flow situations using a differential approach which includes applying Bernoulli and Euler’s equations for an incompressible inviscid flow field, and to open flow situations using control volume analysis.
Performance Objectives:
- Describe the fundamental concepts and definitions of fluid mechanics: continuum, velocity and stress fields, viscosity, Newtonian, and Non-Newtonian fluids.
- Provide flows representation using timelines, pathlines, streamlines, and streaklines.
- Classify flows (inviscid/viscous, laminar/turbulent, internal/external, incompressible/compressible).
- Apply basic equation of fluid statics.
- Apply Archimedes’ principle of buoyancy.
- Explain the relationship between gage and absolute pressures and pressure measurement with manometers and barometers.
- Analyze hydrostatic force on submerged surfaces.
- Discuss the Reynolds Transport Theorem for relating system formations to control volume formations.
- Analyze continuity and momentum equations in integral form.
- Analyze continuity and momentum equations in differential form.
- Apply the equations of continuity and momentum for solving flow problems in practice.
- Determine the total, local, and convective accelerations of a fluid particle from the velocity field.
- Determine stream function for two-dimensional incompressible flow.
- Illustrate translation, rotation, and deformation (linear and angular) of fluid particle.
- Apply Euler’s equations for incompressible inviscid flow.
- Apply Bernoulli equation for incompressible inviscid flow.
- Define static, stagnation, and dynamic pressures and their measurements.
- Apply dimensional analysis for a steady incompressible flow.
- Define important dimensionless numbers: Re, Eu, Fr, and M and describe their physical significances.
- Analyze laminar flow between parallel plates and in pipes and obtain analytical velocity distributions.
- Compute the flow rate, the wall shear stress, and distribution.
- Analyze turbulent flow in pipes and ducts using semi-empirical theories and experimental data.
- Analyze and compute head losses in pipes and ducts.
- Measure flow with various devices: restriction devices, linear flow meters, etc.
- Compare the boundary-layer concept and boundary-layer thicknesses: displacement thickness, disturbance thickness, and momentum thickness.
- Compute boundary-layer thickness using the momentum integral equation and analyze the effects of pressure gradients on boundary-layer flow.
- Estimate lift and drag for common body shapes from published data.
- Apply appropriate equations to analyze open-channel flow with uniform depth.
Outline:
- Introduction
- The concept of a fluid
- Scope of fluid mechanics
- Methods of analysis
- Dimensions and units
- Fundamental Concepts
- Fluid as a continuum
- Velocity and stress fields
- Newtonian and non-Newtonian fluids
- Viscous and inviscid flows
- Laminar and turbulent flows
- Compressible and incompressible flows
- Internal and external flows
- Fluid Statics
- Basic equation of fluid statics
- Pressure variation in a static fluid
- Pressure measurements
- Hydrostatic forces on submerged surfaces
- Buoyancy and stability
- Basic Equations for a Control Volume
- Basic laws for a system
- Reynolds transport theorem
- Continuity equation in integral form
- Momentum equation in integral form
- Momentum equation with acceleration
- The first law of thermodynamics
- The second law of thermodynamics
- Fluids in Motion
- Velocity and flow visualization
- Conservation of mass
- Fluid translation, rotation, and deformation
- Motion of a fluid particle
- Momentum equation
- Incompressible Inviscid Flow
- The momentum equation for frictionless flow: Euler’s equation
- Bernoulli equation
- Bernoulli equation interpreted as an energy equation
- Energy grade line and hydraulic grade line
- Dimensional Analysis
- Nondimensionalizing the basic equations
- Buckingham pi theorem
- Significant dimensionless groups in fluid mechanics
- Flow similarity
- Flow in Pipes and Ducts
- Laminar flow between parallel plates
- Laminar flow in pipes
- Head losses in pipe flow
- Solution of pipe flow problems
- Methods of flow measurement
- Boundary Layers
- Boundary layer concept
- Boundary layer thicknesses
- Momentum integral equation for boundary layer flow
- Pressure gradients in boundary layer flow
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