2018 Introduction to Environmental Turbulence

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Academic unit or major
Graduate major in Urban Design and Built Environment
Tamura Tetsuro 
Class Format
Media-enhanced courses
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Course description and aims

Various kind of turbulence phenomena in nature are discussed from an environmental and disaster mitigation point of view in urban field. Its analytical understanding and representation of model are shown. Physical mechanism of buoyancy in comlex turbulence and the resulting characteristics of atmospheric turbulent boundary layer are clarified. In numerical analysis of turbulence, the mathematical description and physical meaning of turbulence transport are indicated and the simulation technique is explained for environmental and disaster mitigation problems.

Student learning outcomes

Real flow field in urban environment is captured as turbulence in the fluid dynamic sense and its physical mechanism is understood. Weak wind sensitively affected by temperature and strong wind required for capturing fluctuating behavior are discussed by the environmental and disaster mitigation senses. Numerical model and the predictive method are studied. Also, based on the simulation examples, the methods for solving the problems are confirmed.


urban environment, turbulence phenomena, the equation of fluid flows, statistical approach, atmospheric boundary layer, transfer problem, numerical analysis, turbulence modeling, LES

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

Lecture provides the handouts.
One execise and one report are required.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Analysis of fluid flows in enviromnetal and disaster mitigation problems Understand the relation of fluid flow analysis with envionmental and disaster mitigation problems.
Class 2 Introduction of the governing equations and its statistical approach Introduce the governing equations and indicate the equation for turbulence based on statistical approach.
Class 3 Physical mechanism of complex turbulence and the characteristics of atmospheric boundary layer Understand the turbulence structures affected by temperature and capture the characteristics of ABL
Class 4 Partial differentiall equations in transport problems and its numerical analysis Study the numerical method of the equation in transport problems.
Class 5 Turbulence modeling based on the eddy viscosity concept Understand the modeling concept based on the eddy viscosity for turbulence analysis.
Class 6 Turbulence modeling based on the transport equations Understand the modeling concept supported by the transport equations of turbulence quantities.
Class 7 Filtering technique and large eddy simulation By filtering the governing equations of fluid flows, formulate the modeling of large eddy simulation.
Class 8 Application of turbulence modeling for solving the environmental and disaster mitigation problems Analyze the environmental and disaster mitigation problems using turbulence modeling and solve the problems.


Not in particular

Reference books, course materials, etc.

Lecture provides the handouts.

Assessment criteria and methods

Evaluate by the execise on turbulence analysis and the report on turbulence modeling.

Related courses

  • UDE.E507 : Applied Environmental Turbulence
  • ARC.S423 : CFD on Buildings and City
  • UDE.E404 : Basic Engineering on Thermal Environment
  • UDE.E505 : Applied Engineering on Thermal Environment

Prerequisites (i.e., required knowledge, skills, courses, etc.)

Not in particular

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