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DTSTAMP:20220812T074334Z
LOCATION:Foyer 2nd Floor
DTSTART;TZID=Europe/Stockholm:20220628T090000
DTEND;TZID=Europe/Stockholm:20220628T110000
UID:submissions.pasc-conference.org_PASC22_sess181_pos121@linklings.com
SUMMARY:P01 - Shallow Water Simulations on Complex Ocean Domains using Blo
 ck-Structured Grids
DESCRIPTION:Poster\n\nP01 - Shallow Water Simulations on Complex Ocean Dom
 ains using Block-Structured Grids\n\nFaghih-Naini\n\nReal-world ocean doma
 ins often have complex geometry and topography and are thus best suited fo
 r unstructured-mesh discretizations. However, structured grids offer perfo
 rmance advantages on cache-based architectures due to regular memory acces
 ses. To combine the geometrical flexibility of unstructured meshes with th
 e performance benefits of structured ones, we developed a block-structured
  grid generator for realistic ocean domains. In order to be able to repres
 ent correctly small features such as small islands and narrow channels, we
  enhance our methodology by allowing the generated grids to cover a larger
  area than the actual computational domain and introduce masking to exclud
 e excessive grid elements. The automatically generated block-structured gr
 ids are used for simulations with GHODDESS, a code generation framework ba
 sed on ExaStencils which discretizes the shallow water equations by a quad
 rature-free discontinuous Galerkin method. A key feature of the grid gener
 ation with regard to high performance computing is the ability to exactly 
 specify a required number of blocks, i.e. load imbalances can be avoided. 
 We validate our approach by comparing the simulation results on unstructur
 ed and masked block-structured grids for complex ocean domains and present
  performance studies for our new methodology.
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