EP8208 - Heat and Mass Transfer in Porous Media

Examination arrangement

Examination arrangement: Oral examination

Evaluation Weighting Duration Grade deviation Examination aids
Muntlig 100/100

Course content

Fick´s, Navier-Stokes, Euler´s, Bernoulli's and Newton's second equations and conservation laws in transport processes. The Chapman-Enskogs, two-film, Eyrings, hydrodynamical, penetration, and varying interface renewal theories. The models and concepts of Dufour, Soret, Onsager, Kingery, Luikov and Stamm. The analogy of micro and macro transport processes. Criteria of similarity, model and object equations. Equations for steady state and transient convective and molecular diffusion in gases, liquids (ionic or not), concentrated solutions and porous solids. The gradients of concentration, moisture, temperature, pressure and phase change. Dimensionless groups and experiments on internal and external transport in laminar and turbulent flows. Transport properties in multicomponent mixtures. Transport in bubbles, droplets, cellular, capillary and porous solids.
Quasi-steady method and mass transport in equally-accessible surfaces. The development of transport rates in with chemical reaction, diffusion and convection. Sorption isotherms and spacial polytherms equations with effect of temperature. Sorption inflection points and distribution of micro and macropores and related equations. Experimental application of transport equations and correlations.

Learning outcome

Knowledge based educational objectives:
 Given the phases, conditions, geometries of the systems, the student will :
 Introduce the similarity principle of heat and mass transfer for conversion of the transport object equations to model equations.
 Apply the Navier-Stokes, Euler and Bernoulli equations to multi-component transport in ideal, incompressible and viscous and non-viscous fluids.
 Compute mass transfer in porous solid, liquid, and gas based on Fick's first and second laws, and heat transfer from Fouriers and Newtons laws of conduction and convection.
 Identify the transport mechanism as governed internally or externally based on mass and heat conservation laws.
 Analyze steady state and transient transport under laminar or turbulent flow.
 Define the transport resistances arranged in series, parallel and mixed.
 Compute dimensionless groups related to the governing mechanisms based on the correlations for j factors and dimensionless groups.
 Characterize the concentration, thermal and hydrodynamic boundary layers and the properties related to the governing transport mechanisms.
 Develop the mass diffusivity equations based on gas kinetic theory and molecular collisions.
 Calculate mass transfer in: dilute, concentrated, ideal and non-ideal solutions, organic and inorganic mixtures, liquid solutions with variable concentrations of non and electrolytes.
 Determine mass transfer in porous solids based on theory, lab data and empirical equations.
 Identify the stages of moisture movement in: non and isothermal drying, diffusion, effusion, capillary and multi-component flow.

Based upon the educational objectives the student will develop skills and ability to:
 Indentify if the transport mechanisms occurs in: steady state, transient, laminar, turbulent, internal and external flow.
 Apply the appropriate equations to better design the transport processes.
 Perform computations of mass and heat transfer for binary and multi-component systems such as, exchangers, evaporators, filters, membranes, scrubbers, absorbers, drying, particles and phase separators.

General competence:
 Once concluded the course the students general competence will include:
 Conducting experimental work on heat and mass transport based on governing laws, fundamentals and principles of application.
 Designing and maintaining mass and heat transport equipment and separation processes.
 Auditing and evaluating on mass and heat transport in related industrial plants and processes.
 Compare performances on mass transport and energy consumption in industrial processes and systems.
 Analyzing and establishing strategies for enhanced mass and heat transport in mechanical, petroleum, food and chemical plants.

Learning methods and activities

Colloquies. Voluntary exercises. To pass the course a score of at least 70 percent is required.

Required previous knowledge

TEP4130 Heat and Mass Transfer, or similar.

Course materials

Lecture notes, articles, ++, text book.

More on the course

No

Facts

Version: 1
Credits:  7.5 SP
Study level: Doctoral degree level

Coursework

Term no.: 1
Teaching semester:  AUTUMN 2013

Language of instruction: English

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Subject area(s)
• Energy and Process Engineering
• Thermodynamics
• Thermodynamics
Contact information
Course coordinator: Lecturer(s):

Department of Energy and Process Engineering

Examination

Examination arrangement: Oral examination

Term Status code Evaluation Weighting Examination aids Date Time Examination system
Autumn ORD Muntlig 100/100 2013-12-09
Spring ORD Muntlig 100/100
• * The location (room) for a written examination is published 3 days before examination date. If more than one room is listed, you will find your room at Studentweb.
Examination

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