Valid for: 2015/16
Decided by: Education Board E
Date of Decision: 2015-04-13
Elective for: F5, F5-bem, M4-bem, Pi4-bem
Language of instruction: The course will be given in English
The aim of this course is to provide basic theoretical knowledge on turbulence as well as the design of turbulence models and their applicability. Furthermore, the intention is to provide skills in the analysis of turbulent flows. This knowledge should be sufficient to understand the background of turbulence models and the ability to chose an appropriate turbulence model for a given flow case.
Knowledge and understanding
For a passing grade the student must
be able to describe the physical mechanisms of the transition from laminar to turbulent flow for a simple flow case
be able to explain Kolmogorov’s theory, including the basic assumptions and the validity of the theory
be able to, from a phenomenological perspective, assess if a flow is turbulent
be able to explain some of the important and basic terms of the subject
be able to describe the character of the turbulence in different flow situations with respect to the properties and development of the turbulence, and explain how the differences between these flow situations are reflected in the modelling
Competences and skills
For a passing grade the student must
be able to analyse a flow case and suggest a method for numerical simulation with respect to governing equations, possible simplifications and choice of turbulence model, and also to compare with alternative methods.
be able to scrutinise and from given criteria estimate the credibility of results from turbulent flow simulations
Judgement and approach
For a passing grade the student must
be able to actively participate in discussion of problems relevant for the subject
be able to present, both orally and in writing, a technical report containing analyses and choice of turbulence model
The course contains the basic theory for turbulent flows, the transition from laminar to turbulent flows and the physical basis for different types of turbulence models. The turbulence theory part contains statistical and phenomenological description of turbulence Kolmogorov’s hypotheses, and also wall bounded and free shear flows. Homogeneous and isotropic turbulence is discussed as well as anisotropy in different types of flow. The modelling part contains the most common types of turbulence models, i.e the ones based on the Reynolds averaged equations and Large Eddy Simulation. The physical background and effects of different models are discussed. The mathematical description is also treated, averaging of the governing equations, and derivation of the extra equations needed.
Grading scale: TH
Assessment: Examination is individual as well as based on group work. The compulsory home works and laboratory exercises are reported in writing, individually. The project assignment is reported group-wise both in writing and orally at a seminar, where all group members shall participate actively. To get a passing grade (grade 3) all compulsory parts, i.e. home works, laboratory exercises and the project assignment must be approved. A higher grade than 3 is set based on a volontary oral exam.
The number of participants is limited to: No
Course coordinator: Johan Revstedt, Johan.Revstedt@energy.lth.se
Course coordinator: Robert Szasz, Robert-Zoltan.Szasz@energy.lth.se
Course homepage: http://www.energy.lth.se
Further information: The course is based on lectures, exercises, laboratory exercises, home work and group work in the form of a smaller project assignment. The course will be given in English.