ME6203 Mass Transport - PowerPoint PPT Presentation
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ME6203 Mass Transport
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To examine fundamental principles of diffusive and convective mass transfer and ... Desalination of brackish water by reverse osmosis. Etc etc. Term Paper assignment ... – PowerPoint PPT presentation
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Title: ME6203 Mass Transport
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ME6203 Mass Transport
- ME 6203 Mass Transport
- Objectives
- To examine fundamental principles of diffusive
and convective mass transfer and their
applications in analysis and syntheses of
engineering systems. - Outcomes expected
- Ability to develop appropriate physical models
and corresponding mathematical models for
engineering systems involving transfer of mass - (b) Ability to solve mathematical formulations
and interpret them for design, analysis or
research, and - (c) Ability to critically assess technical
literature and utilize it in formulating and
solving inter-disciplinary engineering problems
involving mass transport.
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Outline
- Principles of transport phenomena differential
formulations of conservation equations of mass,
momentum and energy scale analysis diffusion in
gases, liquids and solids estimation methods for
diffusivities free and forced convection mass
transfer inter-phase mass transfer overall mass
transfer coefficients simultaneous heat and mass
transfer applications to engineering problems
involving absorption, adsorption, drying etc.
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MASS TRANSPORT (ME6203)Lecture Time Friday 1800
2050 hrs E3-06-03Professor Arun S.
MujumdarDepartment of Mechanical and Production
EngineeringRoom EA-05-38 Tel 6516-4623
mpeasm_at_nus.edu.sg
- Why Study Mass Transfer (Transport)?
- Numerous applications much more diverse and
commonplace than pure heat transfer. Following is
a short list of selected examples - Evaporation of liquids and suspensions
- Drying over 100 types commercially used
- Biomedical devices artificial lungs, kidneys
etc. - Desulphurisation of flue gases from power plants
- Gas cleaning 9wet scrubbers)
- Controlled drug release technology
- Flavor retention in food processing
- Frying, cooking of foods
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Application areas (contd)
- Frying, cooking of foods
- Biochemical processing brewing operations
- Air-, water-pollution thermal pollution
- Soil decontamination
- Purification of gases/liquid/solid mixtures
- Metallurgical processing
- Evaporation of water into air in a cooling tower
- Drying of wood, paper, polymers, foods, biotech
products and textiles - Leakage of helium from the laser of a copying
machine - Diffusion of carbon into iron during
case-hardening of a gear wheel
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More applications
- Manufacture of petroleum products
- Mineral processing
- Catalytic oxidation of carbon monoxide and
unburnt hydrocarbons in an automobile catalytic
converter - Measurement of humidity using wet and dry
thermocouples - Combustion of pulverized coal in a power plant
furnace - Combustion of kerosene droplets in a gas turbine
combustion chamber - Combustion of iron in oxy-acetylene steel cutting
- Absorption of sulfur dioxide into an alkaline
solution in a power plant flue-gas scrubber - Doping of semiconductors for transistors
- Discharge of a lead-acid battery
- Power generation by a fuel cell
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Application areas -contd
- Aeration of sewage for biological treatment
- Evaporation and condensation in gas-controlled
heat pipes - Ablation of a heat shield on a re-entry vehicle
- Erosion of a graphite or rhenium nozzle in a
solid-propellant rocket - Scrubbing of radioactive nuclides in a nuclear
reactor pressure-suppression pool following an
accident involving core degradation - Oxidation of Zircalloy fuel rod cans by steam
following a loss-of-coolant (LOCA) accident in a
boiling-water nuclear reactor - Separation of oxygen and nitrogen in the
separation column of a gaseous oxygen plant - Blood oxygenation in a rotating-disk oxygenator
during open-heart surgery - Desalination of brackish water by reverse osmosis
- Etc etc
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Term Paper assignment
- About the Term Paper Requirement
- This assignment is designed to give you
opportunity to research independently a topic of
your interest, carry out the necessary literature
search and present it in writing and orally. This
will require self-study and provide experience in
written and oral communication. Details of the
format for the technical paper and final
presentation will be provided in the class. - For the Term Paper assignment, you may choose any
one of the following options - Review critically a narrow subject area within
the scope of the course - Write a critical review of a published paper in
heat and mass transfer which includes a
mathematical treatment or simulation of a
heat/mass transfer process - Design strategy for a mass transfer operation
e.g. drying, evaporation etc - Simulation of a mass transfer operation with or
without heat transfer( may be analytical or
computational using MATLAB,MATHEMATICA or other
software - Critical evaluation of estimation or measurement
techniques for diffusivities of gases or liquids
or solids
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Term Paper-contd
- A list of appropriate journals, reference books
etc will be supplied to help you select a
suitable topic. - As part of this course, a half day workshop is
being organized on Saturday, March 14, 2009
which will cover a number of topics that are
directly relevant to the main theme of this
course. It will broaden your knowledge of the
subject and make you familiar with the wide range
of engineering applications of mass transport (or
transfer) fundamentals to practice. - Paper may be prepared in groups of 2-3 under some
conditions to be discussed
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Mid Term Quizzes, Assignments
- First quiz will be held in mid-February second
in late March - Several sets of home assignments will be given.
Please submit individual solutions. Please use
both sides of paper for both printed and
hand-written work. Also, term papers maybe
submitted in hard copy ( use both sides of paper)
and soft copy format. Oral presentation PPTs
should also be submitted for evaluation on CD.
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Additional information
- Reading assignments will be given from textbook
as well as IVLE or Prof. Mujumdars website - http//serve.me.nus.edu.sg/arun
- Sample term paper presentations are available on
this site (Teaching Resources/ Mass Transport)
for information - Please review basic engineering maths- solution
of ODEs and linear PDEs. Also, basic fluid
mechanics and heat transfer at undergrad level.
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About modeling, levels of math models,
dimensional analysis etc
- Why model?
- Different levels of modeling
- Role of experiments
- Use of dimensional analysis
- Physical meaning of key dimensionless groups e.g.
Reynolds, Prandtl, Schmidt, Sherwood, Nusselt
number etc. - Analogy with heat transfer
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Please review
- Mass transport by diffusion and by convection
- Dr Balaya will consider diffusion in solids,
liquids and gases - This will be followed by convective diffusion
principles, math modeling and numerous
applications - First study simple flows e.g.. Boundary layers,
tube/channel flows. Jet flows etc - Next, engineering applications in drying,
humidification /cooling etc and energy systems
e.g. fuel cell modeling
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From undergrad fluid mechanics and heat transfer,
review..
- Derivation of conservation equations of mass,
momentum and energy- last needed for simultaneous
heat and mass transfer - Analogy with momentum and heat transfer- where
appropriate - Meaning of dimensionless groups
- Etc etc
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