3 papers
math.NA2020
Distributed and Adaptive Fast Multipole Method In Three Dimensions
Jonathan Bull, Stefan Engblom
We develop a general distributed implementation of an adaptive fast multipole method in three space dimensions. We rely on a balanced type of adaptive space discretisation which su…
math.NA2017
Preconditioned smoothers for the full approximation scheme for the RANS equations
Philipp Birken, Jonathan Bull, Antony Jameson
We consider multigrid methods for finite volume discretizations of the Reynolds Averaged Navier-Stokes (RANS) equations for both steady and unsteady flows. We analyze the effect of…
physics.comp-ph2016
A fast direct solver for the advection-diffusion equation using low-rank approximation of the Green's function
Jonathan R. Bull
We present a fast direct solution method for the advection-diffusion equation in one and two dimensions with non-periodic boundaries. Computational cost is reduced to $\mathcal O(N…