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# Details for the Course Syllabus for Course MVKN90F valid from Autumn 2019

General
Aim
• 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.
Contents
• 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.
Knowledge and Understanding
• For a passing grade the doctoral 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 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 doctoral 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 estimate the credibility of results from turbulent flow simulations
Judgement and Approach
• For a passing grade the doctoral 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
Types of Instruction
• Lectures
• Seminars
• Laboratory exercises
• Exercises
• Project
Examination Formats
• Oral exam
• Written report
• Written assignments
• Seminars given by participants
• The compulsory home works and laboratory exercises are reported in writing, individually. The project assignment is reported both in writing and orally at a seminar, where active participation at the other presentations is also required. Giving a seminar on a specific topic from the course is also required. To get a passing grade all compulsory parts, i.e. home works, laboratory exercises, seminar, project assignment and oral exam must be approved
• Failed, pass
• Basic course in fluid mechanics
Assumed Prior Knowledge
• Mathematics equivalent to a master degree in mechanical engineering
Selection Criteria
Literature
• Pope, S. B: Turbulent Flows. Cambridge University Press, 2003. ISBN 0521598869.
Further Information
• Course coordinator: prof. Johan Revstedt, johan.revstedt@energy.lth.se, 046-2224302
Course code
• MVKN90F