Course syllabus
Simulering av rumsbränder
Simulation of Fires in Enclosures
VBRN15, 5 credits, A (Second Cycle)
Valid for: 2012/13
Decided by: Education Board 2
Date of Decision: 2012-03-16
General Information
Main field: Fire Safety Technology.
Compulsory for: MFST1
Language of instruction: The course will be given in English
Aim
The course is designed to provide basic knowledge of how the
spread of fire and combustion gases is simulated using
”Computational Fluid Dynamics” (CFD), in fire safety design and
fire investigations. It also provides an understanding of the
limitations of the numerical and physical models used and an
awareness of the most common sources of error.
Learning outcomes
Knowledge and understanding
For a passing grade the student must
- be able to describe the physical models used for conservation
of mass, material, energy, and momentum.
- be able to describe in depth models for combustion, radiation
and turbulence (RANS, LES).
- be able to describe various numerical methods for solving the
equation sets.
- be able to identify the limitations and most common sources of
error of the model components used.
Competences and skills
For a passing grade the student must
- be able to calculate the spread of combustion gases in various
enclosure configurations using CFD programs.
- be able to assess calculated results against experimental
data.
- be able to decide on how the uncertainty in a simulation can be
estimated on the basis of assumptions included in the physical and
numerical models used.
- be able to understand and use professional terminology within
the field of fire evolution simulation using CFD.
- be able to report on, both orally and in writing, and discuss
the implications of the executed simulation of the spread of
combustion gases in association with fire safety design and fire
investigations.
- be able to make use of material published in technical
references and user manuals for advanced simulation programs for
combustion gas spreading.
Judgement and approach
For a passing grade the student must
- demonstrate insight into the possibilities and limitations of
fire safety simulation methods, as well as their role in advanced
building technical project planning and in human responsibility for
their use.
- demonstrate the ability to analyse and evaluate individually
the results of CFD calculations.
- demonstrate capability for identifying his/her own needs for
further knowledge and for on-going improvement of his/her own
competence in fire safety simulation.
Contents
- Introduction to CFD
- Time and length-scales in fires
- Turbulence models
- Numerical methods
- Large eddy simulation (LES)
- Combustion models
- Radiation models
- Soot models
- Heat transfer models
- Creation and processing of CFD models
- Common errors and troubleshooting in CFD modelling
Examination details
Grading scale: UG
Assessment: Written individual examination and approved individual assignments.
Admission
Admission requirements:
Required prior knowledge: Fire Chemistry and Explosions.
The number of participants is limited to: 40
Selection: Student on the MFST programme or BSC exam or equivalent.
The course overlaps following course/s: VBR200
Reading list
- Lecture notes.
- Manuals to the computer code FDS.
- Cox, G. and Kumar, S.: SFPE Handbook of Fire Protection Engineering, Chapter 3:8 ”Modelling Enclosure Fires Using CFD”. NFPA, Quincy, Massachusetts.
- Carlsson, J.: Computational strategies in flame-spread modelling involving wooden surfaces. Brandteknik, Report 1028 , 2003. Licentiat thesis. Chapter 4-6.
- Versteeg, H. K. and Malalasekera, W: An Introduction to Computational Fluid Dynamics, The Finite Volume Method (2nd Ed.). Harlow, Pearson Education Limited, 2007.
- Guan Heng Yeoh and Kwok Kit Yuen: Computational fluid dynamics in fire engineering,, Theory, modelling and practice. Butterworth-Heinemann, 2009. Also available as E-book.
Contact and other information
Course coordinator: Professor Patrick van Hees, Patrick.van_Hees@brand.lth.se