Dr. Lohner's areas of interest include numerical methods, solvers, grid generation, parallel computing, visualization, pre-processing, fluid-structure-thermal interaction, shape and process optimization, digital twins, structural monitoring techniques, and computational crowd dynamics.

His codes and methods have been applied across many fields, including aerodynamics of airplanes, cars, and trains; hydrodynamics of ships, submarines, and UAVs; shock-structure interaction; dispersion analysis in urban areas; hemodynamics in vascular diseases; and pedestrian safety assessments.

He is the author of more than 900 articles covering the fields enumerated above, as well as a textbook on Applied CFD Techniques.