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h2. {toggle-cloak:id=Introduction} Introduction
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PIV or Particle image velocimetry (PIV) is an optical method used to measure velocities and related properties in fluids.
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h2. {toggle-cloak:id=Methods} Materials and Methods
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h3. Laboratory research setup
!Laboratory Research Set-Ups^PIV.jpg!
h3. Heat experiment
h3. Ramping down experiment
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h2. {toggle-cloak:id=Results}*Figure 1.* PIV setup
h2. Results and Discussion
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!Tube Floc Pictures and Graphs^flocPIV.gif!
{cloak}*Figure 2.* Animation showing different size/shape of flocs and their movement.
h2. {toggle-cloak:id=Challenges} Challenges
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* High load of data input couldhave led causeto computer crash.
* The refraction of light due to the shape of the tube would skew the images captured.
* The 2D images would not do justice on 3D environment of settling tube. Smaller flocs could hide behind bigger flocs and it would be difficult to do trajectory analysis.
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h2. {toggle-cloak:id=Promising} Promising Tool\!
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* Can observe settling velocities of high percentage of particles
* Can filter particles by size and get particle size and velocity distributions
* Should be able to build up statistics that we can relate to flocculation efficiency
* Could complement turbidimeter as method of determining extent of flocculation
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