(Hybrid Eulerian-Lagrangian Method)
Fully nonlinear potential-flow solver.
Seakeeping in minutes, on a single PC.
O(N log N) complexity. Seakeeping cases done in minutes.
Nonlinear free surface + instantaneous wet surface. Only viscosity omitted.
Just provide a triangular hull mesh. No free-surface meshing needed.
Free surface up to 100× body length at minimal extra cost.
Three layers of "Hybrid" design enable HELM's balance of accuracy, speed, and simplicity.
Overset grids on an earth-fixed frame. Free surface is auto-handled; users only supply a body mesh.
Semi-Mixed Eulerian-Lagrangian tracking via Zakharov formulation. PLANNED Full Lagrangian mode for slamming & jet flows.
SCBEM core: spectral method for far-field waves, BEM for near-field flow — large domain, small cost.