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151-0105-00L 4 Credits BSC , MSC D-HEST , D-MAVT , D-PHYS , D-MATH , D-ITET

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Quantitative Flow Visualization

Lecturers & Examiners: Prof. em. Dr. Thomas Rösgen

VVZ CR n/a

Last Updated: 2026-02-05 15:48:30

Abstract

The course provides an introduction to digital image analysis in modern flow diagnostics. Different techniques which are discussed include image velocimetry, laser induced fluorescence, liquid crystal thermography and interferometry. The physical foundations and measurement configurations are explained. Image analysis algorithms are presented in detail and programmed during the exercises.

Objective

Introduction to modern imaging techniques and post processing algorithms with special emphasis on flow analysis and visualization. Understanding of hardware and software requirements and solutions. Development of basic programming skills for (generic) imaging applications.

Content

Fundamentals of optics, flow visualization and electronic image acquisition. Frequently used mage processing techniques (filtering, correlation processing, FFTs, color space transforms). Image Velocimetry (tracking, pattern matching, Doppler imaging). Surface pressure and temperature measurements (fluorescent paints, liquid crystal imaging, infrared thermography). Laser induced fluorescence. (Digital) Schlieren techniques, phase contrast imaging, interferometry, phase unwrapping. Wall shear and heat transfer measurements. Pattern recognition and feature extraction, proper orthogonal decomposition.

Resources

Lecture Notes

Handouts will be made available.

General Information

Language: English
Levels: BSC , MSC

Examination

Type: session examination
Mode: oral 30 minutes

This course will be offered for the last time in the Autumn Semester 2021. The examination can be taken/repeated for the last time in the Summer Session 2022.

Course Components

Type	Title	Time & Place	Hours
lecture with exercise	Quantitative Flow Visualization This course will be offered for the last time in Autumn Semester 2021.	Tue 10:15-13:00 (ML H 41.1)	3 h weekly

Offered In

Computational Science and Engineering Bachelor
- Additional Electives from the Fields of Specialization (CSE Master)
Mechanical Engineering Master
- Core Courses
  - Energy, Flows and Processes (The courses listed in this category “Core Courses” are recommended. Alternative courses can be chosen in agreement with the tutor.)
Computational Science and Engineering Master
- Fields of Specialization
  - Fluid Dynamics (One of the course units 151-0103-00L Fluid Dynamics II 151-0109-00L Turbulent Flows is compulsory. Students able to follow courses in German are advised to choose 151-0103-00L Fluid Dynamics II.)
Biomedical Engineering Master
- Track Courses
  - Bioimaging
    - Recommended Elective Courses (These courses are particularly recommended for the Bioimaging track. Please consult your track advisor if you wish to select other subjects.)
Physics Master
- Electives
  - General Electives (Students may choose General Electives from the entire course programme of ETH Zurich - with the following restrictions: courses that belong to the first or second year of a Bachelor curriculum at ETH Zurich as well as courses from GESS "Science in Perspective" are not eligible here. The following courses are explicitly recommended to physics students by their lecturers. (Courses in this list may be assigned to the category "General Electives" directly in myStudies. For the category assignment of other eligible courses keep the choice "no category" and take contact with the Study Administration ( ) after having received the credits.))