Problem 1: Reynold's number a rotating brush uses a device similar to the device shown in HD Figure 8.24 to remove plaque. The fluid used in the device is a baking soda slurry. Baking soda slurry is 3.0% baking soda (sodium bicarbonate) in water, where 0.90% is the saturation limited of baking soda in water. If the inlet velocity is 0.24 m/s with inlet diameter of 5.4 mm at 23°C. The nozzle tip has a diameter of 0.51 One can has your teeth cleaned professionally using ith a jet stream of a baking soda slurry. For baking soda slurries, the dentist mm. Assume no frictional effects. See page 4 for sodium bicarbonate-viscosity graph. State any other assumption needed. F K24 Inlet Flow Outlet Flow A. What is the Reynold's number for the fluid entering the device? B. Is the flow laminar or turbulent? C. For the same mass flow rate as in part A), determine the Reynold's number if the temperature is increased to 95°C. Hint: ratios can be used. State any assumption. Laminar or turbulent? D. What is the Reynold's number for the fluid exiting the device at 23°C for the same mass flow rate as in part A)?
Problem 1: Reynold's number a rotating brush uses a device similar to the device shown in HD Figure 8.24 to remove plaque. The fluid used in the device is a baking soda slurry. Baking soda slurry is 3.0% baking soda (sodium bicarbonate) in water, where 0.90% is the saturation limited of baking soda in water. If the inlet velocity is 0.24 m/s with inlet diameter of 5.4 mm at 23°C. The nozzle tip has a diameter of 0.51 One can has your teeth cleaned professionally using ith a jet stream of a baking soda slurry. For baking soda slurries, the dentist mm. Assume no frictional effects. See page 4 for sodium bicarbonate-viscosity graph. State any other assumption needed. F K24 Inlet Flow Outlet Flow A. What is the Reynold's number for the fluid entering the device? B. Is the flow laminar or turbulent? C. For the same mass flow rate as in part A), determine the Reynold's number if the temperature is increased to 95°C. Hint: ratios can be used. State any assumption. Laminar or turbulent? D. What is the Reynold's number for the fluid exiting the device at 23°C for the same mass flow rate as in part A)?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:2.0
1.6
NH4HCO,
NaHCO3
1.2
0.8
0.4
0.0
0.0
0.5
1.0
1.5
2.0
2.5
Concentration, mol/l
Viscosity, cSt
Transcribed Image Text:Problem 1: Reynold's number
One can has your teeth cleaned professionally using
a rotating brush or with a jet stream of a baking soda slurry. For baking soda slurries, the dentist
uses a device similar to the device shown in HD Figure 8.24 to remove plaque. The fluid used
in the device is a baking soda slurry. Baking soda slurry is 3.0% baking soda (sodium
bicarbonate) in water, where 0.90% is the saturation limited of baking soda in water. If the inlet
velocity is 0.24 m/s with inlet diameter of 5.4 mm at 23°C. The nozzle tip has a diameter of 0.51
mm. Assume no frictional effects. See page 4 for sodium bicarbonate-viscosity graph.
State any other assumption needed.
FIGURE 8.24
Inlet
Flow
Outlet
Flow
A. What is the Reynold's number for the fluid entering the device?
B. Is the flow laminar or turbulent?
C. For the same mass flow rate as in part A), determine the Reynold's number if the
temperature is increased to 95°C. Hint: ratios can be used. State any assumption.
Laminar or turbulent?
D. What is the Reynold's number for the fluid exiting the device at 23°C for the same mass flow
rate as in part A)?
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