Assignment 3

# Assignment 3 - results. (Entries are suspended-solids...

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Assignment 3 Q.1 Two particles are released in water at the same time. Particle A has a diameter d a of 0.4 mm. Particle B has a diameter d b , of 0.9 mm. What is the ratio of the settling velocity of particle A to that of particle B in laminar flow and in turbulent flow? Assume equal densities. Q.2 Suppose that a column is filled with water containing a uniform suspension of particles A and B as described in Q. 1. Particle B is removed with 100% efficiency in exactly 10 s. What is the percent removal of particle A? Q.3 A settling column analysis is run on a type-2 suspension with the following
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Unformatted text preview: results. (Entries are suspended-solids concentrations at stated times.) Time, min Depth, m 40 80 120 160 200 240 280 0.5 820 369 238 164 107 66 41 33 1.0 820 442 369 279 213 164 115 90 1.5 820 631 476 361 287 230 180 148 2.0 820 672 558 426 353 287 238 187 2.5 820 713 590 492 402 344 262 230 3.0 820 722 615 533 460 394 320 262 3.5 820 738 656 574 492 418 360 303 Determine the theoretical efficiency of a steeling basin with a depth of 3.5 m, a volume of 1400 m 3 , and an inflow of 11,200 m 3 /d...
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## This note was uploaded on 09/13/2011 for the course CIVL 242 taught by Professor Gh during the Fall '09 term at HKUST.

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