2023 BFY4 Abstract Detail Page
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| Abstract Title: |
W19: Vortex toroid of magnetic stirrer in a liquid |
| Abstract: |
Fluid mechanics is a topic not generally covered in undergraduate physics courses. We present an experiment designed for a senior lab that explores fluid mechanics and is simple to implement. For some students, this is the only time in their undergraduate studies that they would be exposed to these topics.
The main component of the set up is a magnetic stirrer. These are commonly used in several types of laboratories to mix different materials. It consists of a magnet rotating with an adjustable frequency around a fixed vertical axis below a flat horizontal surface. The rotation of the magnet brings a magnetic stirrer bar into rotation on the bottom of a container that contains a fluid seeded with micron sized particles placed on the flat surface. The rotation creates a toroidal vortex. As the funnel shaped vortex develops the liquid level rises at the edge of the container.
This set-up is combined with Particle Image velocimetry (PIV) for the analysis. This is a whole-field technique providing instantaneous velocity vector measurements in a medium undergoing motion. Data analysis techniques like cross-correlation and pattern recognition allow viewers to track the motion of the medium and determine velocity fields. |
| Abstract Type: |
Workshop
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Author/Organizer Information |
| Primary Contact: |
Irene Dujovne
University of Massachusetts, Amherst
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