About us



KalWin Engineering is a spin-off of the group „Wind Engineering and Fluid Mechanics“ of the Ruhr-University Bochum. Through our many years of scientific and teaching activities in the group, we have built up a deep technical know-how in fluid mechanics and numerics and experience in the field of experimental and numerical simulation of turbulent wind flows in the built environment.

Dr.-Ing. Cornelia Kalender

CEO and Partner

„Since 2008, I have been actively working with numerical flow models in wind engineering in research and teaching at the Ruhr-Universität Bochum. In my doctorate (completed in 2015), I worked in particular on the synergetic combination of physical wind tunnel experiments and numerical models. The focus was on quality assurance and validation of numerical simulation results for near-ground wind flows.“


Dr. Kalender is a registered member of the Chamber of Civil Engineers of North Rhine-Westphalia and an active member of the Windtechnologische Gesellschaft (WTG) e.V. (Association of German Wind Engineers).

Dr.-Ing. Ulf Winkelmann

CEO and Partner

„CFD simulations in wind engineering and building aerodynamics have interested me since 2012. During my work at the Ruhr-Universität Bochum, I worked in depth on the numerical modelling of vortex-excited oscillations of cylinders flowing around them in my PhD (completed in 2022). Here, different methods of turbulence modelling as well as different approaches for moving grids were a topic.“