Research and Development

In-house simulations for safety and comfort

At SL Rasch, close collaboration between the architecture, engineering, and research and development departments is standard practice. This permits an interdisciplinary, iterative and integrative planning process. The benefits are obvious – for instance when it comes to simulating climatic conditions. Thanks to the CFD tools we have developed in-house, we are able to predict comfort indicators with a very high degree of accuracy – including differences between actual and apparent temperatures, relative humidity, CO2 concentration, the age of the air and odour dispersion. The results are then factored into our design and evaluation processes.

In projects where pedestrian flows have to be planned in advance for safety reasons, we develop special crowd management simulations for validating new architectural and functional design layouts. The software is used for analysing places where large numbers of people gather, such as places of pilgrimage, conference centres, train stations, museums, or sports and music venues. The evacuation of aircraft, ships and trains is another area of application.

Crowd management simulation


When designing the Temporary Mataf Ring Structure, SL Rasch used PedFlow to simulate the Tawaf ritual in which pilgrims circle the holy Kaaba in Mecca. The simulations were used to avoid potential future congestion by factoring crowd flows into the planning phase.