Computational fluid dynamics in an equation-based modeling environment

The simulation of the energy performance of buildings has historically been compartmentalized along the lines separating different disciplines or different analysis tools, despite their interrelations. These interrelations motivate the development of integrated analyses, which has often focused on linking preexisting and independent simulation software together. This paper reports on initial work using a different integration strategy in which the ‘pre-existing and independent software’ all exist in the universe of the model description language Modelica. Specifically, the beginnings of a Modelica CFD package suitable for buildings and using the discrete-velocity Boltzmann  equation is introduced.