The Australian National University · S1 2026 · FACULTY OF ENGINEERING

ENGN3224 Fluid Mechanics and Heat Transfer (with ENGN6224)

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ENGN3224 Overview

Fluid Mechanics and Heat Transfer (with ENGN6224)
— A source-grounded engn3224 guide to pressure, hydrostatic balance, buoyancy and the complete published assessment structure.
  • ANU School of Engineering
  • First Semester, 2026
  • 6 units
  • a thermofluids engineering course

ENGN3224/6224 covers fluid statics and dynamics, conservation, viscous flow, pumps, conduction, convection, heat exchangers, CFD and radiation. It is taught within ANU School of Engineering. It is an undergraduate course co-taught with a postgraduate course. It carries 6 units.

  • Current split is 20/30/10/40 The shared 2026 syllabus supersedes the generic indicative table.
  • Three labs total 30% Pump, CFD and heat-exchanger laboratories each carry 10%.
  • PG difference preserved ENGN6224 completes an extra CFD Part B within the same 10% lab.
  • No course hurdle stated Specified absences produce zero on the missed item rather than an invented automatic course fail.
ENGN3224 · The Australian National University
An independent, AskSia-authored study guide. AskSia is not affiliated with, endorsed by, or sponsored by The Australian National University; the course code and name are used for identification only.
Assessment

How ENGN3224 is assessed

ComponentWeightFormat
Homework Assignments20%Ten homework assignments worth 2% each
Pump Laboratory10%Practical pump laboratory
CFD Laboratory10%ENGN3224 Part A; ENGN6224 Parts A and B
Heat-exchanger Laboratory10%Practical heat-exchanger laboratory
Mid-semester Quiz10%Covers the fluid-mechanics half
Final Examination40%Whole course with greater emphasis on the heat-transfer half

The shared 2026 syllabus controls 20% homework, 30% laboratories, 10% mid-semester quiz and 40% final. The official pages retain an indicative 20/20/10/50 split. ENGN6224 adds CFD Part B within the same 10% lab.

Contents · every chapter, one map

What ENGN3224 covers

Read Fluid Properties, Pressure and Statics as the foundation, Turbomachinery, Pump Curves and Cavitation as the main change in method, and Thermal Radiation and Enclosures as the final application of the course.

01

Fluid Properties, Pressure and Statics

pressure · hydrostatic balance · buoyancy · calculate pressure, resultant force and equilibrium in static fluids
02

Flow Description, Reynolds Number and Bernoulli

streamline · Reynolds number · Bernoulli equation · classify a flow and apply energy balance only after checking assumptions
03

Integral Mass and Momentum Balances

control volume · mass flow rate · momentum flux · compute forces and reactions from control-volume balances
04

Differential Conservation and Navier–Stokes

material derivative · continuity equation · Navier–Stokes equation · reduce governing equations using geometry, symmetry and boundary conditions
05

Internal and External Viscous Flows

head loss · boundary layer · drag coefficient · select pipe-loss or external-flow relationships from geometry and regime
06

Turbomachinery, Pump Curves and Cavitation

pump curve · system curve · net positive suction head · locate the operating point and check efficiency and cavitation margin
07

Heat-transfer Modes and Conduction

thermal conductivity · thermal resistance · fin efficiency · build a conduction resistance network and evaluate extended surfaces
08

Convection and Boundary-layer Correlations

convection coefficient · Nusselt number · film temperature · choose and apply a convection correlation from geometry, regime and boundary condition
09

Heat Exchangers and CFD

log-mean temperature difference · effectiveness · mesh independence · combine energy balance, heat-exchanger method and CFD validation
10

Thermal Radiation and Enclosures

blackbody · emissivity · view factor · calculate surface and enclosure radiation exchange with geometry visible

It is positioned as a thermofluids engineering course.

The shared course uses conservation equations across fluids and heat transfer, with an additional CFD task for ENGN6224.

Assessment in engn3224 is distributed as follows: 20% homework, 30% laboratories, a 10% mid-semester quiz and a 40% final examination

The operational assessment conditions matter here.

The final covers the whole course with greater emphasis on Weeks 7–12; current permitted-material conditions are controlled by the syllabus and live instructions.

What makes engn3224 demanding is concrete: choosing a physically valid model and keeping signs, units, regime and boundary conditions consistent through the calculation

Treat the engn3224 hurdle status as unconfirmed.

Check the current official course outline for any component-level pass rule before relying on the overall mark.

For enrolment planning, The current official pages publish course requisites; students should confirm eligibility in their program.

Read Fluid Properties, Pressure and Statics as the foundation, Turbomachinery, Pump Curves and Cavitation as the main change in method, and Thermal Radiation and Enclosures as the final application of the course.

Worked example · free

Check a pipe-and-pump operating point

Q [5 marks]. AskSia-authored practice. A pump is added to a piping system but the measured flow is below the design value. Diagnose the result.
  • 1Identify the exact decision and source-supported facts.
  • 1Select and define the controlling concepts.
  • 1Trace the mechanism or calculation visibly.
  • 1Test a competing explanation or changed condition.
  • 1Conclude with the evidence boundary.
Draw system and pump curves, calculate static and friction head, locate the intersection, check efficiency and NPSH, then test changed resistance or speed.
Sia tip — The pump does not impose a flow independently; the system intersection selects it.
Glossary

Key terms

pressure
Normal force exerted per unit area by a fluid. This chapter uses the concept when students calculate pressure, resultant force and equilibrium in static fluids.
hydrostatic balance
Pressure variation balancing fluid weight in a fluid at rest. It helps explain the reasoning required to calculate pressure, resultant force and equilibrium in static fluids.
buoyancy
Net upward pressure force equal to the weight of displaced fluid under the stated conditions. Its limit matters because gauge reference, geometry and density must be explicit.
streamline
Curve everywhere tangent to the instantaneous velocity field. This chapter uses the concept when students classify a flow and apply energy balance only after checking assumptions.
Reynolds number
Ratio comparing inertial and viscous effects in a flow. It helps explain the reasoning required to classify a flow and apply energy balance only after checking assumptions.
Bernoulli equation
Mechanical-energy relation along a streamline under its stated assumptions. Its limit matters because viscous loss, pumps, turbines and unsteadiness require an extended relation.
control volume
Defined region through whose boundary mass, momentum and energy may cross. This chapter uses the concept when students compute forces and reactions from control-volume balances.
mass flow rate
Mass crossing a section per unit time. It helps explain the reasoning required to compute forces and reactions from control-volume balances.
momentum flux
Transport of linear momentum through a control surface. Its limit matters because surface normals and velocity directions control the signs.
material derivative
Rate of change following a moving fluid particle. This chapter uses the concept when students reduce governing equations using geometry, symmetry and boundary conditions.
continuity equation
Local conservation equation for fluid mass. It helps explain the reasoning required to reduce governing equations using geometry, symmetry and boundary conditions.
Navier–Stokes equation
Momentum balance for a Newtonian fluid including pressure, viscous and body-force effects. Its limit matters because discarded terms must be justified rather than silently omitted.
head loss
Mechanical-energy loss per unit weight caused by friction and fittings. This chapter uses the concept when students select pipe-loss or external-flow relationships from geometry and regime.
boundary layer
Near-surface region where viscous velocity gradients are significant. It helps explain the reasoning required to select pipe-loss or external-flow relationships from geometry and regime.
FAQ

ENGN3224 FAQ

How does assessment work in Fluid Mechanics and Heat Transfer (with ENGN6224)?

20% homework, 30% laboratories, a 10% mid-semester quiz and a 40% final examination. The final covers the whole course with greater emphasis on Weeks 7–12; current permitted-material conditions are controlled by the syllabus and live instructions.

Where is the hardest reasoning in Fluid Mechanics and Heat Transfer (with ENGN6224)?

Choosing a physically valid model and keeping signs, units, regime and boundary conditions consistent through the calculation. ENGN3224/6224 covers fluid statics and dynamics, conservation, viscous flow, pumps, conduction, convection, heat exchangers, CFD and radiation.

What form does the exam or final task take in Fluid Mechanics and Heat Transfer (with ENGN6224)?

The final covers the whole course with greater emphasis on Weeks 7–12; current permitted-material conditions are controlled by the syllabus and live instructions. 20% homework, 30% laboratories, a 10% mid-semester quiz and a 40% final examination.

Which pass conditions apply in Fluid Mechanics and Heat Transfer (with ENGN6224)?

Treat the engn3224 hurdle status as unconfirmed. Check the current official course outline for any component-level pass rule before relying on the overall mark. 20% homework, 30% laboratories, a 10% mid-semester quiz and a 40% final examination.

Which teaching period does this Fluid Mechanics and Heat Transfer (with ENGN6224) resource cover?

It is aligned to First Semester, 2026; confirm your enrolled class and timetable in the current institutional system. ENGN3224/6224 covers fluid statics and dynamics, conservation, viscous flow, pumps, conduction, convection, heat exchangers, CFD and radiation.

Who controls the official rules for Fluid Mechanics and Heat Transfer (with ENGN6224)?

The university does. This is an independent engn3224 study resource; current institutional instructions remain authoritative for assessment operation. ENGN3224/6224 covers fluid statics and dynamics, conservation, viscous flow, pumps, conduction, convection, heat exchangers, CFD and radiation.

Study strategy

How to study for the exam

Retrieve the course map, practise the recurring method—draw the control volume and boundary conditions, select conservation and constitutive relationships with units and signs visible, calculate the flow or heat-transfer result, then test dimensions, limiting behaviour and regime assumptions—on changed scenarios, and verify every operational assessment detail in the live institutional system.

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