Developing geophysical models since 2008, primarily hydrodynamic codes. While modeling initially started with sorption models, the focus quickly moved to reactive species transport, which was incrementally extended into a hydrodynamic model.

In 2010, reordering was developed for implicit upwind subsystems in irrotational regimes, followed by convective forms for external FVCOM coupling (2012), unstructured Laplacian interpolation (2015), and a momentum transport engine replacing FVCOM in advection-dominated regimes (2017). In 2020, a micro–meso met processor with radiative forcing was added, followed in 2021 by verification against analytical wave solutions for tractable geometries, and a remote sensing module for bathymetry acquisition. Tidal forcing and turbulence closure of the model, Wavedyne, were made globally independent from FVCOM, achieving survey validation in 2022 and enhanced mesh compatibility following the development of an automated raster Voronoi mesh generator.

In 2023, sediment transport and settling was added to the model, including wave-resolving simulations. Since then the number of available term approximations and boundary conditions has been expanded. The model has heretofore been validated with five surveys. Joining the GHI in 2026, the emphasis is on surface heat exchange and evaporation.
I am happy when a new model comes together. Make me happy by sending me your fluid dynamics or geophysical modelling case or PDE to solve with analytically tractable shapes.

Contact
Johannes Lawen
Hamburg University of Technology
Institute of Geo-Hydroinformatics B-9
Am Schwarzenberg-Campus 3 (E)
21073 Hamburg, Germany
Email: lawen.johannes(at)gmail.com
Website: www.tuhh.de/ghi