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Fluid Mechanics Research Corner

Topics for beginners, intermediate and advanced fluid mechanics researchers

Fluid Mechanics Webinars

PIV, LDV, PDPA, Combustion, and more

These webinars by TSI experts cover topics for beginners, intermediate and advanced level fluid mechanics researchers. Browse the videos below for measurement techniques and solutions, tutorials on optimizing your system, and fluid studies that feature TSI instruments (from fundamental flow to environmental to biomedical).

To join our mailing list and learn about new and upcoming webinars, sign up on the form at the bottom of this page. All live TSI fluid mechanics webinars are followed by an open Q&A session. 

General

Measuring Dust Dynamics Using Shadowgraph

This webinar discusses the challenges associated with sizing dust particles with imaging. In addition, an example research study is presented where TSI's Size Shape Analysis (SSA) imaging module is used. Presented by Dr. Sheng-Chieh Chen, Particle Laboratory, University of Minnesota, and Dr. Wing Lai of TSI Incorporated. Dust (Arizona Road Dust) dynamics are used for calibrating particle instruments, correlating health effects in exposure studies, as well as challenging different types of filters. During this webinar, we explore the non-intrusive shadowgraph imaging technique for measuring dust dynamics. It is an excellent approach in determining dust dynamics, providing the simultaneous result of sizing velocity, as well as concentration of the dust particles in a plane. Since the system is based on the measurement of the “shadow” of the dust particles—with laser illumination in the forward scatter direction—the size of the shadow is measured directly without any assumed pre-conceived shape of the dust particles. The concentration is estimated based on the inspection area size and the number of dust particles detected. The system allows measurements over a period of time, giving the result of particle concentration and flux information.

Introduction to the Flat Flame Burner and its use in Combustion Diagnostics applications

The flat-flame burner is a helpful device for calibrating a laser induced fluorescence (LIF) system with a known concentration of species. This webinar will provide an introduction to the standard flame created by a specialized burner system (known as the "Flat Flame Burner") and its use in helping make optical diagnostic methods quantitative. The use of a standard burner to generate a laminar flame provides a reference flame that is highly repeatable in operation. As a result, data sets generated by other researchers using the same standard burner can be used to check measurements obtained by another user or method. Further, extensive detailed chemistry calculations can also be used in conjunction with measurements as another check of measurements. As a result of these characteristics, it is possible to use this burner to produce flames that can be used to calibrate diagnostics for measurement of various scalars, such as temperature or species concentration, including OH. For best results, it is critical to carefully control operating conditions and flows. As a result, the overall burner support system (flow meters, safety measures, etc.) is equally as important as the burner itself.

Introduction to Optical Temperature Measurements and Use of the Flat Flame Burner for Calibration and Validation

The flat-flame burner is a helpful device for calibrating a laser induced fluorescence (LIF) system with a known concentration of species. In this overview, a number of optical methods (e.g., Rayleigh, Raman, CARS) are introduced as established methods for determining temperature and/or other scalar quantities within reacting flows. As a means to help verify measurements using these techniques, the flat flame burner is also introduced and its application for calibration is discussed.

 

Laser Doppler Velocimetry (LDV) and Phase Doppler Particle Analysis (PDPA)

Compact Laser Doppler Velocimetry System for Hydrodynamic and Aerodynamic Applications

TSI's PowerSight LDV system is introduced; learn about its compact nature and the advantages of using a solid state laser solution for laser doppler velocimetry.

Fiber Optic Based PDPA Measuring a Spray

Using fiber-optic based Phase Doppler Particle Analysis to measure a spray.

 

Particle Image Velocimetry (PIV)

Introduction to PIV and Advanced Processing Methods for PIV and Time Resolved PIV

Basic and advanced methods for using PIV systems and interpreting and processing data. View this webinar to become familiar with TSI's time-series analysis toolbox, included with the INSIGHT4G software package.

PIV Uncertainty Quantification Using Cross Correlation Peak Ratio

Learn more about uncertainty analysis in planar PIV measurements. Details of the Peak Ratio method of determining PIV uncertainty are discussed. Verify the accuracy of your data and learn how to identify and quantify the degree of uncertainty in measurements.

Dynamic Masking Technique for PIV Processing

Dynamic masking automates the process of creating masks in PIV images. Especially useful for objects that are not stationary from snapshot-to-snapshot. Also covers how to use TSI's Insight 4G software to mask objects in flows and generate more accurate vector fields.

Using PIV for Multiphase Flows

Multiphase flows can be difficult to analyze with optical methods. Learn some of the techniques used in this webinar.

Particle Image Velocimetry

Charts, animations and video from TSI PIV projects.

 

Volumetric Particle Image Velocimetry

Advances in 3D Particle Tracking: Algorithmic Improvements to Volumetric Velocimetry

This webinar will discuss the methods used in TSI's INSIGHT™ V3V-4G software to extract volumetric velocity information from a three-dimensionally illuminated region of a flow field. Additionally, algorithms designed to improve the positional accuracy and vector yield will be discussed. Real data acquired from TSI's V3V-Flex system will be used in a number of examples. Watch this webinar to also learn about some recent advances in 3D PTV.

Investigating Turbulent Boundary Layer Flow Structures Using 4-Camera Volumetric PIV

This webinar will focus on turbulent boundary layer structure measurements, taken by a 4-camera volumetric PIV system, elucidating the development of turbulent hairpin vortices. Four high-pixel resolution cameras, each with 8 million pixels, were employed to capture high spatial resolution measurements. An Nd:YAG pulse laser with 380 mJ energy per pulse illuminated the measurement volume. The complete volumetric flow was captured with the system, providing instantaneous and time-averaged u, v and w velocity components. Flow quantities including iso-surfaces of vorticity described the development of the hairpin forces.

New Approaches to the Study of Hydrodynamics in Animals with Volumetric PIV

The study of fish locomotion can be greatly enhanced by understanding the 3D motion of the fluid in which they interact. This webinar focuses on research in this area using a V3V volumetric PIV system.

Volumetric 3-Component Velocimetry (V3V)

Learn about TSI's volumetric PIV system: Volumetric 3-Component Velocimetry (V3V).

Sharks, Robots, and Lasers: Volumetric Imaging of Fish Locomotion

A captivating webinar showcasing the use of volumetric particle image velocimetry for fish locomotion imaging.

High Resolution V3V Measurements in Airflow

This webinar discusses taking volumetric PIV data in airflows at high spatial resolution.

V3V Windtunnel TSI

Virtual demo of TSI's volumetric particle image velocimetry system

 

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