Upcoming seminars
| Coordinator: | Stefan Engblom stefane@it.uu.se |
| Time: | Wednesdays 13.15--14.00 |
| Location: | Room 101130, Ångström house 10 |
| Join the mailing list: | https://lists.uu.se/sympa/subscribe/it-tdb-seminar |
30/4/2025 <Valborg>
7/5/2025 Olof Runborg, https://www.csc.kth.se/~olofr/ Links to an external site.
Title: Solving Helmholtz Equation Using the Temporal Wave Equation
Abstract: We consider iterative methods for the Helmholtz equation that are based
on the related time domain wave equation. In each iteration, the
solution to the wave equation with a time-periodic forcing is computed
and filtered in time. For Dirichlet and Neumann problems the iteration
corresponds to a linear and coercive operator which, after
discretization, is recast as a positive definite linear system of
equations that can be solved with the conjugate gradient method. The
main benefit of using these iterations comes when considering large
scale problems. Implementing parallelized, high order methods that run
efficiently on big computers is typically easier to do for time domain
methods than for traditional Helmholtz solvers. We also show how the
iterations can be used to turn a multiscale method for the wave equation
into a multiscale method for the Helmholtz equation.
14/5/2025 Monika Eisenmann, https://portal.research.lu.se/sv/persons/monika-eisenmann Links to an external site.
21/5/2025 Doghonay Arjmand, https://www.uu.se/en/contact-and-organisation/staff?query=N15-1365
Links to an external site.
28/5/2025 Oscar Grånäs, https://www.uu.se/kontakt-och-organisation/personal?query=N6-743 Links to an external site.
4/6/2025 Josefin Larsson, https://www.kth.se/profile/josla Links to an external site.
11/6/2025 Tom Britton, https://www.su.se/profiles/tbrit-1.182592 Links to an external site.