Numerical Simulation of Pollutants and Fire Propagation

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Course Unit Code338-0720/02
Number of ECTS Credits Allocated5 ECTS credits
Type of Course Unit *Choice-compulsory
Level of Course Unit *Second Cycle
Year of Study *First Year
Semester when the Course Unit is deliveredWinter Semester
Mode of DeliveryFace-to-face
Language of InstructionCzech, English
Prerequisites and Co-Requisites There are no prerequisites or co-requisites for this course unit
Name of Lecturer(s)Personal IDName
KOZ30prof. RNDr. Milada Kozubková, CSc.
BOJ01doc. Ing. Marian Bojko, Ph.D.
BLE02doc. Ing. Tomáš Blejchař, Ph.D.
The course is theoretical and practical mastery of the numerical solution of dispersion of pollutants in the atmosphere possibly the spread of gaseous emissions from point, line or area sources. In doing so, may be counted relief terrain. If the student is familiar with basic aspects of thermodynamics and combustion, it is possible to solve problems of fire spreading and primarily solid combustible materials in the areas
Learning Outcomes of the Course Unit
Students will learn about theoretical and practical approaches for the numerical solution of dispersion of pollutants in the atmosphere, through which they learn to design a mathematical model for solving the problem of this applications. An important part of the work is to evaluate solution, compare with theory and experiments and determine the limits of solvability in the field of application. This can give result in recommendations for the cases of emergency planning.
Course Contents
L - Lecture, E - Exercise
1. L.: Introduction, numerical modeling of fluid flow - various commercial systems, Fluent - physical models, turbulence models, commercial systems for the solution of flow, solved examples from the firms, environmental jobs
E.: Working on workstations, introduction to Fluent
2. L.: Turbulent and laminar fluid flow, coordinate system, the Navier-Stokes equations (laminar flow) and the continuity equation, counting rules, examples, flow with sudden expansion section
E.: Ansys Meshing, the environment, drawing basic elements, modeling of laminar flow in a rectangular space, graphical evaluation of results
3. L.: Boundary conditions for incompressible flow E.: Create a sudden expansion geometry, methods of networking in case of flow with sudden expansion flow cross-section geometry, boundary conditions
4. L.: Ansys Meshing, generation and control networkE.: Meshing 2D and 3D regions, network control, export to Fluent
5. L.: Fluent programming system, finite volume integration method for the one-dimensional continuity equation and momentum equations, an iterative cycle, the interpolation scheme, convergence (residuals, uderrelax)
E.: Modelling of laminar flow in a rectangular gap
6. L.: Mathematical models of turbulence, Reynolds stresses, time averaging, Reynolds rules, Boussinesq 's hypothesis, turbulent viscosity
E.: Graphical evaluation of results
7. L.: Statistical models of turbulence, two-equation turbulence model, wall functions
E.: Turbulent flow behind the step, turbulent boundary conditions
8. L.: General conservation equations, an example of heat equation + boundary and initial conditions, numerical methods (differential method, finite volume method), geometry and generation of mesh, methods for solving the discretized equations, LGS solver, multigrid
E.: The solution of the flow behind the step using different turbulence models and methods of evaluation
9. L.: Heat transfer, convection, conduction, conditions on the wall, the wall heat transfer
E.: Calculation of non isothermal flow in a pipe with wall heat transfer
10. L.: 3D modeling of species dispersion, comparison of concentrations in 2D and 3D
E.: Example of species dispersion, comparison of concentrations in 2D and 3D
11. L.: The flow with solid particles and drops, the species and their definitions
E.: Distribution of solid particles in the flow of the chimney
12. L.: Modelling the spread of pollution in the open and closed air, a solution of selected tasks, the role of Sutton approach
E.: Solution of individual problem
13. L.: Modelling the spread of fire, i.e. heat and combustion products
E.: Solution of individual problem
14. L.: Consultation of individual seminar problem and discussion
E.: Solution of individual problém
Recommended or Required Reading
Required Reading:
INCROPERA, F. a kol. Fundamentals of Heat and Mass Transfer, 6. edition, John Wiley and Sons 2007, 996p., ISBN 978-0-471-45728-2

ANSYS FLUENT INC. FLUENT User’s guide. Available from local Help of ANSYS Fluent
KOZUBKOVÁ, Milada, Tomáš BLEJCHAŘ a Marian BOJKO. Modelování přenosu tepla, hmoty a hybnosti: učební text. Ostrava: VŠB - Technická univerzita Ostrava, 2011. ISBN 978-80-248-2491-8.

KOZUBKOVÁ, Milada. Modelování proudění tekutin: FLUENT, CFX [CD-ROM]. Ostrava: VŠB - Technická univerzita Ostrava, 2008. ISBN 978-80-248-1913-6.

ANSYS Fluent Users Guide, Theory Guide, dostuplné při instalaci studentské verze
Recommended Reading:
NIKOLAY I. KOLEV. Multiphase flow dynamics. 1, Fundamentals / - 2nd ed. Berlin : Springer, c2005 - xxxv, 753 s. : il. + 1 CD-ROM ISBN 3-540-22106-9
BOJKO, Marian. 3D proudění - ANSYS fluent: učební text [CD-ROM]. Ostrava: Vysoká škola báňská - Technická univerzita Ostrava, 2012. ISBN 978-80-248-2607-3.
Planned learning activities and teaching methods
Lectures, Tutorials
Assesment methods and criteria
Task TitleTask TypeMaximum Number of Points
(Act. for Subtasks)
Minimum Number of Points for Task Passing
Exercises evaluation and ExaminationCredit and Examination100 (100)51
        Exercises evaluationCredit35 20
        ExaminationExamination65 20