Urban Heat Island modeling

In the beginning of 2021, we completed the development of a tool for simulating surface temperatures in an urban environment, using a weak coupling approach between temperatures and air velocities

The approach allows for comfort indexes computations at each point in space. It integrates the coupling of fluid mechanics simulations, together with sunlight and thermal dynamic regimes for the built environment.

Results of a case study around the Strasbourg train station (France) are presented next.

The following animation shows the evolution of comfort levels over the first week of the year Sit back and relax!

Animation GIF Strasbourg ICU
Hourly comfort levels during the first week of the year.

Paris Est train station

Roofing and design variations: influence on interior thermal comfort

The study of comfort levels in the Paris Est train station development project was conducted using several steps / methods:

  • A coupling between CFD and dynamic thermal simulation for the calculation of natural ventilation with accurately calculated pressure coefficients
  • The detailed internal distribution of solar fluxes with Radiance software
  • Obtaining indoor comfort levels hour by hour for the whole year and their statistical analysis.

Some graphic results below.