## What does Helmholtz theorem state?

According to a Helmholtz theorem, a vortex cannot start or end in the flow field, so the bound circulation on the wing must be shed into the flow downstream. To make the solution unique, the wake must be shed at the trailing edge to satisfy the Kutta condition (Fig. 6).

**Is Helmholtz decomposition unique?**

Helmholtz theorem is an operator-based decomposition theorem of a vector function and does not indicate directly any uniqueness theorem for boundary value problem.

**Why Helmholtz theorem is useful?**

Helmholtz theorem tells us that these equations are sufficient to fully and uniquely constrain the solution for electric field (E) given boundary conditions. So any solution you can find for this problem is the only correct one.

### Which theorem specifies a unique vector field provided its divergence and curl are known?

Helmholtz’s theorem

This strongly suggests that if we know the divergence and the curl of a vector field then we know everything there is to know about the field. In fact, this is the case. There is a mathematical theorem which sums this up. It is called Helmholtz’s theorem after the German polymath Hermann Ludwig Ferdinand von Helmholtz.

**How do you explain the use of Helmholtz theorem in electromagnetic engineering?**

Helmholtz’ Theorem. Let F(r) be any continuous vector field with continuous first partial derivatives. Then F(r) can be uniquely expressed in terms of the negative gradient of a scalar potential φ(r) & the curl of a vector potential a(r), as embodied in Eqs.

**What is divergence curl?**

Roughly speaking, divergence measures the tendency of the fluid to collect or disperse at a point, and curl measures the tendency of the fluid to swirl around the point. Divergence is a scalar, that is, a single number, while curl is itself a vector.

## What is the difference between divergence and curl?

The divergence of a vector field is a scalar function. Divergence measures the “outflowing-ness” of a vector field. If v is the velocity field of a fluid, then the divergence of v at a point is the outflow of the fluid less the inflow at the point. The curl of a vector field is a vector field.

**When curl is zero?**

A vector field whose curl is zero is called irrotational.

**What is gradient curl and divergence?**

Gradient, Divergence, and Curl. The gradient, divergence, and curl are the result of applying the Del operator to various kinds of functions: The Gradient is what you get when you “multiply” Del by a scalar function. Grad( f ) = = Note that the result of the gradient is a vector field.