Given divergence and curl determine vector field

In summary, the divergence and curl of a vector field A can be determined everywhere in a volume V, while the normal component of curl A is specified on the surface S bounding V. By taking the curl of the curl using the formula \Delta\vec{A}=\nabla(\nabla\bullet\vec{A})-\nabla\times(\nabla\times\vec{A}), three Laplace equations about P, Q, and R can be obtained. However, the vector field can only be determined up to a constant.
  • #1
akshay.wizard
3
0
the divergence and the curl of a vector field "A" are specified everywhere in a volume V. The normal component of curl A is also specified on the surface S bounding V. Show that these data enable one to determine the vector field in the region
 
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  • #2
Try taking the curl of the curl...

(BTW, I think you can only work out the field up to a constant)
 
  • #3
Use the formula:[itex]\Delta\vec{A}[/itex]=[itex]\nabla(\nabla\bullet\vec{A})[/itex]-[itex]\nabla\times(\nabla\times\vec{A})[/itex]. You'll get three Laplace equation about P,Q,R.Assume [itex]\vec{A}[/itex]=(P,Q,R).[itex]\Delta[/itex]means twice [itex]\nabla[/itex].
 

FAQ: Given divergence and curl determine vector field

1. What is divergence and curl in vector fields?

Divergence and curl are two mathematical concepts used to describe the behavior of vector fields. Divergence measures the rate at which a vector field is spreading out or converging at a specific point, while curl measures the tendency of a vector field to rotate around that point.

2. How do you determine a vector field from its divergence and curl?

To determine a vector field from its divergence and curl, you can use the fundamental theorem of calculus. This theorem states that the divergence of a vector field is equal to the integral of its curl over a closed surface. Therefore, by calculating the curl of a vector field and integrating it, you can determine the original vector field.

3. What are some applications of using divergence and curl to determine vector fields?

Divergence and curl are important concepts in many fields of science and engineering, such as fluid mechanics, electromagnetism, and computer graphics. They are used to analyze the behavior of fluids, describe the flow of electric and magnetic fields, and create realistic simulations of natural phenomena.

4. Can a vector field have both non-zero divergence and curl?

Yes, a vector field can have both non-zero divergence and curl. This is known as an irrotational and solenoidal vector field. An example of such a field is the electric field created by a stationary charge, which has a non-zero divergence and zero curl.

5. What are some techniques for visualizing vector fields with given divergence and curl?

There are several techniques for visualizing vector fields with given divergence and curl. One common method is to use streamlines, which are curves that are tangent to the field at every point. Another technique is to use vector plots, which represent the direction and magnitude of the field with arrows. Additionally, color mapping can be used to represent the strength of the field at different points.

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