4. Consider the vector field F(r, y, z) = (x, y, z). (a) Sketch a picture of F. (b) Calculate div F. How can we visualize div F in terms of the vector field? (c) Suppose that F represents a fluid flow in 3-d space. Imagine a small sphere or cube placed at the point (3, 0, 4). Is more fluid flowing into the object or out of it?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
icon
Related questions
Topic Video
Question

REFER TO IMAGE

**Problem 4: Vector Field Analysis**

Consider the vector field \(\mathbf{F}(x, y, z) = \langle x, y, z \rangle\).

**(a) Sketch a picture of \(\mathbf{F}\).**

(Sketch Description: In this section, you need to create a vector field diagram for \(\mathbf{F}(x, y, z) = \langle x, y, z \rangle\). This means that at any point \((x, y, z)\) in space, the vector \(\mathbf{F}\) points directly away from the origin and has a magnitude equal to the distance from the origin. The length of the vectors increases as you move further from the origin.)

**(b) Calculate \(\text{div} \mathbf{F}\). How can we visualize \(\text{div} \mathbf{F}\) in terms of the vector field?**

To calculate the divergence of \(\mathbf{F}\), use the formula for the divergence of a vector field:
\[
\text{div} \mathbf{F} = \frac{\partial F_1}{\partial x} + \frac{\partial F_2}{\partial y} + \frac{\partial F_3}{\partial z}
\]
Given \(\mathbf{F}(x, y, z) = \langle x, y, z \rangle\), the components are \(F_1 = x\), \(F_2 = y\), and \(F_3 = z\). Taking the partial derivatives:
\[
\frac{\partial F_1}{\partial x} = 1, \quad \frac{\partial F_2}{\partial y} = 1, \quad \frac{\partial F_3}{\partial z} = 1
\]
Thus,
\[
\text{div} \mathbf{F} = 1 + 1 + 1 = 3
\]
The divergence of \(\mathbf{F}\) is a constant value of 3. This means that, at any point in space, the vector field \(\mathbf{F}\) represents a uniform source, indicating that fluid is flowing outward from each point in space with a constant rate.

**(c) Suppose that \(\mathbf{F}\) represents a fluid flow in 3-D
Transcribed Image Text:**Problem 4: Vector Field Analysis** Consider the vector field \(\mathbf{F}(x, y, z) = \langle x, y, z \rangle\). **(a) Sketch a picture of \(\mathbf{F}\).** (Sketch Description: In this section, you need to create a vector field diagram for \(\mathbf{F}(x, y, z) = \langle x, y, z \rangle\). This means that at any point \((x, y, z)\) in space, the vector \(\mathbf{F}\) points directly away from the origin and has a magnitude equal to the distance from the origin. The length of the vectors increases as you move further from the origin.) **(b) Calculate \(\text{div} \mathbf{F}\). How can we visualize \(\text{div} \mathbf{F}\) in terms of the vector field?** To calculate the divergence of \(\mathbf{F}\), use the formula for the divergence of a vector field: \[ \text{div} \mathbf{F} = \frac{\partial F_1}{\partial x} + \frac{\partial F_2}{\partial y} + \frac{\partial F_3}{\partial z} \] Given \(\mathbf{F}(x, y, z) = \langle x, y, z \rangle\), the components are \(F_1 = x\), \(F_2 = y\), and \(F_3 = z\). Taking the partial derivatives: \[ \frac{\partial F_1}{\partial x} = 1, \quad \frac{\partial F_2}{\partial y} = 1, \quad \frac{\partial F_3}{\partial z} = 1 \] Thus, \[ \text{div} \mathbf{F} = 1 + 1 + 1 = 3 \] The divergence of \(\mathbf{F}\) is a constant value of 3. This means that, at any point in space, the vector field \(\mathbf{F}\) represents a uniform source, indicating that fluid is flowing outward from each point in space with a constant rate. **(c) Suppose that \(\mathbf{F}\) represents a fluid flow in 3-D
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer
Knowledge Booster
Research Design Formulation
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, advanced-math and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Advanced Engineering Mathematics
Advanced Engineering Mathematics
Advanced Math
ISBN:
9780470458365
Author:
Erwin Kreyszig
Publisher:
Wiley, John & Sons, Incorporated
Numerical Methods for Engineers
Numerical Methods for Engineers
Advanced Math
ISBN:
9780073397924
Author:
Steven C. Chapra Dr., Raymond P. Canale
Publisher:
McGraw-Hill Education
Introductory Mathematics for Engineering Applicat…
Introductory Mathematics for Engineering Applicat…
Advanced Math
ISBN:
9781118141809
Author:
Nathan Klingbeil
Publisher:
WILEY
Mathematics For Machine Technology
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,
Basic Technical Mathematics
Basic Technical Mathematics
Advanced Math
ISBN:
9780134437705
Author:
Washington
Publisher:
PEARSON
Topology
Topology
Advanced Math
ISBN:
9780134689517
Author:
Munkres, James R.
Publisher:
Pearson,