An Immersed Boundary CFD Code for Building and Environment Applications
We present a novel Computational Fluid Dynamics (CFD) software developed for the Building and Environment applications. The technical noveltries are represented by the use of the Immersed Boundary method which allows a fully automated and extremely quick Cartesian Grid generation process. The result is an easy work-flow that takes less than 10 min to prepare the application, no matter of the geometrical complexity of the object of the simulation.
The software focuses on 4 outdoor wind applications: the evaluation of the wind load on constructions, the so called pedestrian comfort analysis on urban districts, the natural ventilation in buildings and the transport and diffusion of contaminants on cities and environmental sites, both in steady-state and transient modes.
The equation for the contaminant is decoupled from the solution of the 5 thermo-fluid dynamic equations (conservation of mass, equation of motion and conservation of energy), and it can be solved on an available, previously computed solution, in frozen mode.
A fully implicit solution algorithm drives the iterative method to the steady-state solution. In case a transient analysis is of interest, the same solution algorithm is used to follow the time evolution time-step after time-step.
The software has been validated against available wind tunnel data.
- 5.Dagnew AK, Bitsuamalk GT, Merrick R (2009) Computational Evaluation of wind pressure on tall buildings. In: 11th American conference on wind engineering, San Juab, Puerto Rico, 22–26 June 2009Google Scholar