Assignment 4 sol

# Assignment 4 sol - CIVL242 Water and Wastewater Engineering Assignment 4 Solution Q1 Solution 1 Determine filtering velocity Filtering velocity =

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CIVL242: Water and Wastewater Engineering Assignment 4 Solution Q1. Solution 1. Determine filtering velocity Filtering velocity = 160 L/m 2 ·min = 0.16 m 3 /m 2 ·min =2.67 x 10 -3 m/s 2. Determine the Reynolds number for the anthracite and sand layers. (a) Anthracite layer μ φρ i w vd = Re At 20 o C, ρ = 998.2 kg/m 3 , μ=1.002 x 10 -3 N·s/m 2 11 . 3 10 002 . 1 ) 10 6 . 1 )( 10 67 . 2 )( 2 . 998 )( 73 . 0 ( Re 3 3 3 = × × × = = - - - i w vd (b) Sand layer 09 . 1 10 002 . 1 ) 10 5 . 0 )( 10 67 . 2 )( 2 . 998 )( 82 . 0 ( Re 3 3 3 = × × × = = - - - i w vd

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3. Determine the friction factor for the anthracite and sand layers. (a) Anthracite layer 72 . 30 75 . 1 11 . 3 ) 4 . 0 1 ( 150 75 . 1 Re ) 1 ( 150 ' = + - = + - = e f (b) Sand layer 24 . 84 75 . 1 07 . 1 ) 4 . 0 1 ( 150 75 . 1 Re ) 1 ( 150 ' = + - = + - = e f 4. Determine the headloss through the anthracite and sand layers. (a) Anthracite layer m d g e V e L f h p s f 054 . 0 ) 10
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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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Assignment 4 sol - CIVL242 Water and Wastewater Engineering Assignment 4 Solution Q1 Solution 1 Determine filtering velocity Filtering velocity =

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