Paper Conference

Proceedings of eSim 2018: 10th Conference of IBPSA-Canada


Streamlining meshing methodologies for annual urban CFD simulations

Timur Dogan, Patrick Kastner

Abstract: For environmental CFD simulations, it is considered best practice to use a box-shaped wind tunnel as simulation domain. A box-shaped wind tunnel, however, shows drawbacks when it comes to simulating air flow from several wind directions — remeshing and additional preprocessing steps may be necessary and can be considerable time constraints. We utilize a routine implemented in Grasshopper to create a cylindrical computational mesh that allows for the simulation of arbitrary wind directions in a streamlined manner with the open source software OpenFOAM. We estimate the time savings that are possible along with specific mesh properties to take advantage of the proposed method. For validation purposes, commonly used wind tunnel data are presented. A proof of concept tool is implemented in the Rhinoceros CAD modeling environment and will be released publicly.
Keywords: CFD, meshing, urban, cylindrical, box-shaped, annual, wind tunnel
Pages: 95 - 104