Gradient with not rectangular domain

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ENRICO SILVESTRI
ENRICO SILVESTRI 2023-1-20
回答： Muskan 2023-3-21
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 ?
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Jiri Hajek
Jiri Hajek 2023-1-20
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

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回答（1 个）

Muskan
Muskan 2023-3-21
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,

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