MECHENG 211

Thermofluids

Semester 2, 2019

Staff

Contents

Calendar notes

The fundamentals of fluid mechanics, thermodynamics and heat transfer with practical applications to engineering devices and systems.

Outcome mapping

Intended learning outcomes

Fluid Mechanics: Determine the dimensions of physical quantities for fluid mechanics, Apply Newton’s law of friction to determine shear in flows. Understand concept of hydrostatic pressure distributions, manometry. Apply the concept of hydrostatics to determine pressures and forces on surfaces. Apply the Bernoulli equation and continuity principle, and their application to simple flows. Determine forces on bodies using concept of momentum balance. Explain key features of developing and developed pipe flows, Reynolds number regimes. Concept of laminar and turbulent flows. Determine frictional and minor loses for laminar and turbulent flows in pipes. Understand main flow measurement methods. Understand and explain key features of flow over flat plates and around cylinders and spheres, laminar and turbulent boundary layers, transition, Reynolds number and drag regimes. Determine lift and drag. Understand the concept of lift generation.

Thermodynamics: Students will be able to define and solve problems in a systematic manner. Describe and apply the concepts of energy, energy transfer and transformation, storage, internal energy, the total energy of a system, heat and work, enthalpy, specific heats, and flow work. Analyse and solve energy flow and energy transfer problems; compute heat and work transfers across boundaries and control surfaces. Ability to explain phase change processes, determine thermodynamic properties of substances involving phase change, determine state of system from given properties, represent states and processes on property diagrams, apply ideal gas equation of state. Ability to apply the concepts of mass and energy conservation, energy loss and efficiency, to enable them to solve simple problems. Able to analyse closed systems and control volumes using mass and energy balance.

Heat Transfer: Understand the concept of heat, heat transfer, modes of heat transfer and their underlying mechanisms. Ability to calculate heat transfer rates due to conduction, convection and radiation. Describe the factors, properties, and terminology associated with these three modes. Identify multiple modes of heat transfer occurring in different situations; be able to quantify corresponding heat transfer rates through application of energy balance or other means. Understand and be able to apply the conduction rate equation. Ability to analyse heat transfer through single and multiple layer walls using the thermal resistance concept. Ability to calculate heat transfer enhancement with pin fins, and use the concepts of fin efficiency and fin effectiveness to determine usefulness of fins in given situations. Understand and be able to describe the physical mechanisms for heat convection, and the concepts of velocity and thermal boundary layers. Describe the physical significance of Reynolds and Nusselt Numbers, and be able to calculate the convective heat transfer coefficient (hence heat transfer rates) using correctly chosen Nusselt number correlations. Be able to describe and explain the local heat transfer trends along flat plates and around cylinders and spheres. Understand the heat exchange process. Apply the concept of overall heat transfer coefficient and energy conservation to the analysis of heat exchangers. Calculate the LMTD of concentric tube heat exchangers. Describe the temperature profiles for different configurations and operating parameters of concentric tube heat exchangers.

Assessment

Coursework

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Exam rules

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Inclusive learning

Students are urged to discuss privately any impairment-related requirements face-to-face and/or in written form with the course convenor/lecturer and/or tutor.

Other assessment rules

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