Unit Operations of Chemical Engineering
7th Edition
ISBN: 9780072848236
Author: Warren McCabe, Julian C. Smith, Peter Harriott
Publisher: McGraw-Hill Companies, The
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Chapter 7, Problem 7.7P
Interpretation Introduction
Interpretation:
The settling time of spherical particles is to be determined.
Concept Introduction:
If size of particle is known then the velocity range is given by the K-criteria concept. Based on the numerical value of this parameter, it is easy to decide which model of velocity calculation is applicable. Typically, for smaller particles where the particle Reynolds number is expected to be less than unity, Stoke’s law applies. On the other hand, for larger particles Newton’s law is applicable.
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Chapter 7 Solutions
Unit Operations of Chemical Engineering
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- A mixture of air and water at a temperature of 25°C flows up through a vertical tube with a length of 4 m and an internal diameter of 25.4 mm with the exit of the tube being at atmospheric pressure. The mass flows of the air and the water are 0.007 kgs¹ and 0.3 kgs-¹, respectively. For air, the density is 1.2 kgm3 and viscosity is 1.85 x 10-5 Nsm-2, and for water, the density is 1000 kgm-3 and viscosity is 8.9 × 10-4 Nsm 2. Answer: 2.7 kNm 2marrow_forwardAt a Pressure of 200 mm Hg, match the substance with the boiling temperature. 69.50°C 1. Benzene 1.92°C 2. Toluene 41.94°C 3. n-Pentane 4. n-Hexane 31.61°Carrow_forwardAt a Pressure of 400 mm Hg, match the substance with the boiling temperature. 62.89°C 1. Styrene 122.69°C 2. Ethanol 3. Toluene 89.48°C 4. Benzene 60.61°Carrow_forward
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