Question

What is the recommended backwash rate for a d90 particle size of 1.5 mm (use particle...

What is the recommended backwash rate for a d90 particle size of 1.5 mm (use particle density
as 2650 kg/m3, water density as 1000 kg/m3, dynamic viscosity as 1x10-3 Pa.s)

Engineering   Civil-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate how long will it take for a particle to settle 0.5 m if the radius...
Calculate how long will it take for a particle to settle 0.5 m if the radius of the particle is 10 nm, 100 nm, 1mm, 10 mm, or 100 mm, and the density of the particle is 1030 or 2650 kg/m3. Water at 20 °C has a viscosity of 0.001002 Pa·s. You are encouraged to use Excel spreadsheet for this problem.
A settling chamber is measuring 6 meters in length, 3 meters in width, and 1.5 meters...
A settling chamber is measuring 6 meters in length, 3 meters in width, and 1.5 meters in height. The air stream flowrate entering the chamber is 17 m3/s, and the average particle size (diameter) is 65 micrometers. Assume a particle density of 1800 kg/m3 and that Stokes law applies. Some properties of air: Atmospheric pressure = 101.4 kPa = 14.7 psi Air density = 1.2 kg/m3. Air viscosity = 1.85x 10^-5 Pa.s. the air stream horizontal velocity in the chamber...
A monomedia anthracite filter has effective size 1.0 mm and a media density 1650 kg/m3. a)...
A monomedia anthracite filter has effective size 1.0 mm and a media density 1650 kg/m3. a) Calculate backwash rate to get a 25-percentage expansion at the design summer temperature of 25oC. b) Calculate the expansion that occurs at the backwash rate determined in part a) at the minimum winter temperature of 5oC.
Problem 4. An approximately spherical particle with a diameter of 0.5 mm and a specific gravity...
Problem 4. An approximately spherical particle with a diameter of 0.5 mm and a specific gravity of 2.5 is released in water with a temperature of 25 °C (density = 997 kg/m3 , dynamic viscosity = 0.890 x 10-3 kgm-1 s -1 ). How far does the particle to travel in 3 s? [Hint: to solve this problem, initially assume laminar flow and use Stoke’s law to estimate the settling velocity of the particle. Then check the Reynolds number. If...
A long, straight horizontal pipeline of diameter 350 mm and effective roughness size 0.03 mm is...
A long, straight horizontal pipeline of diameter 350 mm and effective roughness size 0.03 mm is to be constructed to convey crude oil of density 860 kg/m3 and absolute viscosity 0.0064 N s∕m2 from the oilfield to a port at a steady rate of 7000 m3/day. Booster pumps, each providing a total head of 20 m with an overall efficiency of 60%, are to be installed at regular intervals. Determine the required spacing of the pumps and the power consumption...
A 0.3 m well has a 25 m long screen that covers the entire depth of...
A 0.3 m well has a 25 m long screen that covers the entire depth of an aquifer. The aquifer medium has an effective grain size of 1.5 mm. The well is pumped at a rate of 0.2 m3/s. Assess the validity of Darcy’s law near the well. (Dynamic viscosity of water at 20oC is 1.005*10-3 Ns/m2)
11. Oil is being pumped into a 10.0 mm diameter pipe with a Reynolds number of...
11. Oil is being pumped into a 10.0 mm diameter pipe with a Reynolds number of 2100. The oil density is 855 kg / m3 and its viscosity is 2.1 x 10 -2 Pa. S A) What is your speed in the pipeline? B) You want to keep the same Reynolds number of 2100 and the same speed that in part (a) using a second fluid with a density of 925 kg / m3 and a viscosity of 1.5 x...
Using the Gnielinski correlation, what would the heat transfer coefficient, h (watts per meter kelvin) be?...
Using the Gnielinski correlation, what would the heat transfer coefficient, h (watts per meter kelvin) be? For water (density = 963 kg/m3, dynamic viscosity = 303x10^-6, Pr = 1.89, k = 0.66 w/mk) flowing in a smooth pipe of 20 mm diameter, and Reynolds number being 500000.
Small spheres of diameter 1.01 mm fall through 20°C water with a terminal speed of 1.20...
Small spheres of diameter 1.01 mm fall through 20°C water with a terminal speed of 1.20 cm/s. Calculate the density of the spheres. The viscosity of water is 1.00 × 10-3 Pa·s. (Enter your answer to at least the nearest kg/m3.)
1.If atmospheric pressure is 1.013 x 105 N/m2 and creates a column of mercury 760 mm...
1.If atmospheric pressure is 1.013 x 105 N/m2 and creates a column of mercury 760 mm high. What is the density of mercury in kg/m3 ? No units needed. 2.A car jack works when a mechanic uses a force 1.5 N, on a small piston of radius 6 cm. What force can he exert on a larger piston of radius 0.39 m ? 3If atmospheric pressure is 1.013 x 105 N/m2 , what height of water in meters would it...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT