B. Figure B shows a horizontal cross section of a long vertical cylinder of radius R that is rotated steadily counterclockwise with an angular velocity o in a very large volume of a Newtonian liquid of viscosity µ and density p. The liquid extends effectively to infinity, where it may be considered at rest. The axis of the cylinder coincides with the z axis of a cylindrical coordinate system. This is a laminar, steady state flow without gravity effects. (a) Identify which velocity components of a cylindrical coordinate system are zero for this flow. (b) Formulate the continuity equation for this flow, compute the result and comment on the result of your analysis. (c) Formulate the momentum equation for this flow in the axial direction, explain which terms cancel, give the result of your analysis and express what you learn from this result.

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
icon
Related questions
Question

Please solve part (c) and (d)

### Image Transcription for Educational Website

#### Diagram Explanation

The diagram illustrates the fluid dynamics around a cylindrical object immersed in an infinite fluid volume. The setup represents a common scenario in fluid mechanics, where an object is analyzed within a flowing fluid.

#### Diagram Elements

1. **Cylinder:**
   - Located at the center, the cylinder has a radius denoted by \( R \).
   - An arrow within the cylinder indicates a rotational motion with angular velocity \( \omega \).

2. **Coordinate System:**
   - The origin is at the cylinder's center.
   - A radial line labeled \( r \) extends from the center outward, with an angle \( \phi \) defining its orientation.

3. **Fluid Flow:**
   - The background flow is represented by yellow lines with arrows indicating the direction of the fluid.
   - The fluid is described as having infinite volume surrounding the cylinder.

4. **Equations and Conditions:**
   - The common boundary condition \( R \leq r < \infty \) is highlighted in the boxed region.
   - An important note on boundary conditions as \( r \rightarrow \infty \):
     - \( u_r = 0 \)
     - \( p = p_a \)
   - These conditions are particularly relevant in cylindrical coordinate systems when analyzing flow.

5. **Notes:**
   - A cautionary remark underlines the importance of these conditions that often occur in flows with cylindrical coordinates. 

By understanding this setup, students can learn about cylindrical flow patterns, boundary conditions, and the impact of rotational motion on the fluid dynamics around a cylinder.
Transcribed Image Text:### Image Transcription for Educational Website #### Diagram Explanation The diagram illustrates the fluid dynamics around a cylindrical object immersed in an infinite fluid volume. The setup represents a common scenario in fluid mechanics, where an object is analyzed within a flowing fluid. #### Diagram Elements 1. **Cylinder:** - Located at the center, the cylinder has a radius denoted by \( R \). - An arrow within the cylinder indicates a rotational motion with angular velocity \( \omega \). 2. **Coordinate System:** - The origin is at the cylinder's center. - A radial line labeled \( r \) extends from the center outward, with an angle \( \phi \) defining its orientation. 3. **Fluid Flow:** - The background flow is represented by yellow lines with arrows indicating the direction of the fluid. - The fluid is described as having infinite volume surrounding the cylinder. 4. **Equations and Conditions:** - The common boundary condition \( R \leq r < \infty \) is highlighted in the boxed region. - An important note on boundary conditions as \( r \rightarrow \infty \): - \( u_r = 0 \) - \( p = p_a \) - These conditions are particularly relevant in cylindrical coordinate systems when analyzing flow. 5. **Notes:** - A cautionary remark underlines the importance of these conditions that often occur in flows with cylindrical coordinates. By understanding this setup, students can learn about cylindrical flow patterns, boundary conditions, and the impact of rotational motion on the fluid dynamics around a cylinder.
**Text for Educational Website:**

**B. Analysis of Flow in a Rotating Cylinder**

*Figure B* illustrates a horizontal cross-section of a long vertical cylinder with a radius \( R \). This cylinder is rotated steadily in a counterclockwise direction with an angular velocity \( \omega \) within a large volume of a Newtonian liquid characterized by viscosity \( \mu \) and density \( \rho \). The liquid is considered to extend infinitely and remain at rest. The cylinder's axis aligns with the \( z \)-axis of a cylindrical coordinate system, indicating a laminar, steady-state flow without the influence of gravity.

**(a) Velocity Components of the Flow:**
Identify which velocity components in a cylindrical coordinate system (\( v_r, v_\theta, v_z \)) are zero for this flow.

**(b) Continuity Equation:**
Formulate the continuity equation for the described flow. Compute the result and provide commentary on the implications of your analysis.

**(c) Momentum Equation:**
Develop the momentum equation for this flow in the axial direction. Identify which terms cancel out, discuss the results of your analysis, and interpret the significance of these findings.
Transcribed Image Text:**Text for Educational Website:** **B. Analysis of Flow in a Rotating Cylinder** *Figure B* illustrates a horizontal cross-section of a long vertical cylinder with a radius \( R \). This cylinder is rotated steadily in a counterclockwise direction with an angular velocity \( \omega \) within a large volume of a Newtonian liquid characterized by viscosity \( \mu \) and density \( \rho \). The liquid is considered to extend infinitely and remain at rest. The cylinder's axis aligns with the \( z \)-axis of a cylindrical coordinate system, indicating a laminar, steady-state flow without the influence of gravity. **(a) Velocity Components of the Flow:** Identify which velocity components in a cylindrical coordinate system (\( v_r, v_\theta, v_z \)) are zero for this flow. **(b) Continuity Equation:** Formulate the continuity equation for the described flow. Compute the result and provide commentary on the implications of your analysis. **(c) Momentum Equation:** Develop the momentum equation for this flow in the axial direction. Identify which terms cancel out, discuss the results of your analysis, and interpret the significance of these findings.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 1 images

Blurred answer
Similar questions
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The