I am working with the example . I just tried to change the boundary condition (line 24, on(1, u=0)) to a different value, and the solution does not change. It seems like something is missing, as regardless of the value substituted with 0, the solution always is the same as for u=0. Initially, I want…

A better implementation with full mass matrix heat-TS-2d-PETSc.edp (2.9 KB)

PETSc example (heat-TS-2d-PETSc.edp) incorrectly imlpemented?

fb77 (François Bouchut) January 29, 2025, 1:33pm 11

You may prefer a handmade time loop like this
heat-PETSc.edp (1.7 KB)
Then you have to do second-order, Newton, timestep adaptation by hand. But it is much more understandable than with TSSolve.

Can it possible to find L^2-error and order of convergence in Heat-3d PETSc code (parrallel computing)

Topic		Replies	Views
Maxwell equation with periodic boundary condition using PETSc General Discussion	4	86	January 24, 2025
The parallel solution of the 3D heat conduction equation using PETSc results in errors General Discussion	9	79	October 22, 2024
PETSc on 3D Cube with Periodic Boundary Conditions General Discussion	6	260	November 14, 2023
Periodic boundary conditions with PETSc and vectorial FEspace General Discussion	3	465	June 27, 2022
Boundary condition setup issues in parallel computing General Discussion	3	39	March 14, 2025

PETSc example (heat-TS-2d-PETSc.edp) incorrectly imlpemented?

Related topics