How to integrated over domain

General
1

Hi
I am solving potential equation.
I want to calculate a power
Grad=dot(grad(u),grad(u))
I want to a intersections over the domains i use this one
P=Assembly (p*dx)
But i got error i am working in fenicsx could you what is the mistake.i got integration error
Or how i can write the power could you please tell me
Many thanks

2

It’s difficult to provide help without a minimal working example. See, e.g., Read before posting: How do I get my question answered?

3

Dolfinx assemble_scalar problem
power = dot(grad(u), grad(u)) * dx
p = fem.assemble_scalar(fem.form(power))
i want to find the power of the but i got error

RuntimeError: Failed just-in-time compilation of form: Compilation failed on root node.
RuntimeError: Failed just-in-time compilation of form: Compilation failed on root node.
raise RuntimeError(f"Failed just-in-time compilation of form: {error_msg}“)
RuntimeError: Failed just-in-time compilation of form: Compilation failed on root node.
raise RuntimeError(f"Failed just-in-time compilation of form: {error_msg}”)
could tell me what is the problem

4

Please make a minimal reproducible example. By just providing a snippet without all variables defined, it is tricky to Give any guidance

5

p = fem.assemble_scalar(fem.form(power))
i have problem in this line

6

But as I’ve already stated, you need to give us the complete code, or a minimal reproducible example. That is a code that has all imports and variables defined so that we can inspect the code and run it ourself.