01573nas a2200109   4500008004100000245010100041210006900142260001700211520116300228100002101391856005101412       2015                        en  d00aTowards exascale BEM simulations: hybrid parallelisation strategies for boundary element methods0 aTowards exascale BEM simulations hybrid parallelisation strategi  bSISSA ; ICTP3 aMany fields of engineering benefit from an accurate and reliable solver for the
Laplace equation. Such an equation is able to model many different phenomena,
and is at the base of several multi-physics solvers. For example, in nautical engineering, since the Navier{Stokes system has an extremely high computational cost, many reduced order models are often used to predict ship performance. Under the assumption of incompressible fluid and irrotational flow it is possible to recover a flow field by simply imposing mass conservation, which simplifies to a Laplace equation.
Morevore, the deep theoretical background that surrounds this equation, makes it
ideal as a benchmark to test new numerical softwares. Over the last decades such equation has often been solved through its Boundary
integral formulation, leading to Boundary Element Methods. What makes such
methods appealing with respect to a classical Finite Element Method is the fact
that they only require discretisation of the boundary.
The purpose of the present work is to develop an effcient and optimize BEM for
the Laplace equation, designed around the architecture of modern CPUs.1 aGiuliani, Nicola  uhttp://urania.sissa.it/xmlui/handle/1963/35164