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This semester's research focused on testing the failure prediction of the velocity gradient model developed over the previous semesters for various sets of tubes diameters at upflow velocities of 0.86, 1.73, and 4.32 mm/s.
To isolate the effects of the velocity gradients from the effects of capture velocity, we chose set a constant capture velocity of 0.1 mm/s for all tube settlers. To meet these requirements, the tube settlers were designed without a constant length to diameter (L/D) ratio, which is a plate settler conventional design. The L/D ratio is found by taking the length of a plate and dividing by the spacing between plates or in the case of tube settlers, the diameter. The design approach taken by the team was deemed acceptable because the research aims to propose improved plate settler design parameters (capture velocity and velocity gradient) over conventional parameters like L/D.
The team realized that the failure criterion of the original floc roll up model developed in the Spring 2010 was not conveying information about the magnitude of a failure. The team therefore decided to build a numerical model that would simulate particles trajectories and account for more interactions that could lead to failure. The page gives the current code as well as some explanations about the algorithms and the underlying hypothesis.
Subteam Semester Goals and Future Challenges
Weekly Subteam Progress.
Appendix - Fall 2010 - Useful Equations, definitions and some values for calculating the Pi-ratio
Spring 2010 Team Presentations
Annotated Bibliography of Relevant Literature
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