Integrated Environmental Modeler Simulation (IEMSIM)




Urban flow, thermal, and noise modeling are challenging due to the complex flow physics. There are many existing computational tools available for studying these flow phenomena. However, they are difficult to use for urban planners, architects, and policymakers without a steep learning curve, requiring the input of large amounts of parameters to set up the simulation and requires a detailed understanding of the details. Integrated Environmental Modeler Simulation (IEMSIM) aims to make the urban modeling technology easy to use for the end-users with minimal user training. This technology will make it easy for planners, architects, and policymakers to study the impact of urban design on the living environment without requiring detailed inputs from the user. The advanced users, on the other hand, retains the option of modifying the simulation interaction files to enable more advanced features. In this way, a single setup provides simulation capabilities for both technical and non-technical end-users. The proposed technology can also be integrated as a part of a larger workflow in more complex modeling systems.  The technology provider would like to out-license IEMSIM as-is or partner with a collaborator to improve the interface to develop a commercial-ready version.


Integrated Environmental Modeler Simulation (IEMSIM) is a multi-physics modeling tool to study wind, temperature, and noise mapping in urban areas. IEMSIM can calculate the combined effects of different environmental factors (solar shading, wind speed, air temperature, longwave radiation, and noise) on the urban environment. It can also be used as a stand-alone solver to compute the available solar power or used to perform urban heat island studies. IEMSIM includes novel flow modeling algorithms that ensure atmospheric boundary layer homogeneity in the fetch area and faster convergence of flow solver even under extreme conditions (low wind speed and high heat flux). The surface energy balance includes a unique fully coupled energy formulation which ensures that the wall surface temperatures do not become unrealistically high due to gaps or poor quality of meshing in the gaps. The solver has also been successfully validated against different field campaigns.


IEMSIM has been developed as a smart planning urban design tool to built sustainable and liveable cities. It can be adopted for the planning and design of new housing estates, studying noise mitigation strategies, and investigation of wind flow channels in a single unified platform. IEMSIM can also assist the policymakers with modeling urban heat island in the densely built area and planning for climate mitigation strategies.  The system includes a Python-TkInter UI/UX interaction for the user to set up the case and runs the simulations. A case setup can be performed in a few minutes.


Planning: Plan wind, thermal, and noise mapping in new townships.  Design: Design new buildings and model the day-lighting and detailed wind and temperature information around the buildings.  Shade: Compute greenery planting, facades, and other shading strategies to provide pedestrian shading solutions.  Evaluate: Evaluate flow physics around existing building design to identify areas of improvement.  Silence: Use the in-built noise module to compute the building noise from traffic and plan the placement of noise barriers.