Gradient with not rectangular domain

Hey guys,

I've used the finite elments method to solve a boundary value problem, specifically the transverse potential of a coaxial cable . I've used pdetool to get the mesh and than I solved the problem by myself. Now I want to plot the gradient of the solution and the problem is that the domain is not rectangular so I can't put the vector solution into a matrix form...what should i do ?

[Jiri Hajek]

Since you have pde toolbox, you have access to native MATLAB plotting, which uses the same mesh used for solution: https://www.mathworks.com/help/pde/ug/pdeplot.html

Answer 1

[Muskan]

Hi Enricho,

As per my understanding you can use the “pdeplot(mesh)” function to plot the gradient since you already have got a mesh from the pde toolbox.

Create a PDE model. Include the geometry of the built-in function “lshapeg”. Mesh the geometry and plot the mesh.

You can refer to the following documentation:

Plot solution or mesh for 2-D problem - MATLAB pdeplot (mathworks.com)

I hope the above solution helps to resolve your query.

Thanks,