Course syllabus
Simulering av rumsbrand (CFD)
Simulation of Fires in Enclosures
VBRF16, 9 credits, G2 (First Cycle)
Valid for: 2017/18
Decided by: PLED BI/RH
Date of Decision: 2017-04-03
General Information
Elective for: BI3, RH4
Language of instruction: The course will be given in English
Aim
The course is designed to provide knowledge of how the spread of
fire and combustion gases is simulated using ”Computational Fluid
Dynamics” (CFD), vaious methods for modelling (LES, RANS) 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 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.
- be able toapply, with a certain degree of independence,
newly-acquired knowledge to new fire safety design cases.
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 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
Examination details
Grading scale: TH - (U,3,4,5) - (Fail, Three, Four, Five)
Assessment: Written individual examination and approved individual assignments and group projects. The group project assignment shall be reported both orally and in writing. The written group report shall follow the Department of Fire Safety Engineering's regulations for assignments at Level II, http://www.brand.lth.se/fileadmin/brandteknik/utbild/inuppgkrav.pdf.
Presence at the seminars is mandatory.
The examiner, in consultation with Disability Support Services, may deviate from the regular form of examination in order to provide a permanently disabled student with a form of examination equivalent to that of a student without a disability.
Admission
Admission requirements:
Required prior knowledge: VBR022, VBRF20 Fire Chemistry and Explosions.
The number of participants is limited to: 40
Selection: Credits remaining for the degree.
The course overlaps following course/s: VBRF15, VBRN15, VBR200
Reading list
- Föreläsningsanteckningar.
- Manualer till olika datorprogram exempelvis AC3D, SOFIE, FDS, CFX och visualiseringsprogram.
- G.Cox and S.Kumar: ”Modelling Enclosure Fires Using CFD”.
Contact and other information
Course coordinator: Jonathan Wahlqvist, jonathan.wahlqvist@brand.lth.se
Further information: Group assignments require active participation. Each group member must individually be able to account for the content of the assignment. If a group member does not fulfill the demands of the group or ignores hers/his commitment, she/he can be reassigned to another group or get a fail result.