Summary of best guidelines and validation of CFD modeling in livestock buildings to ensure prediction quality

• Summarization of Best Practice Guidelines for CFD modeling.
• Address on the governing equations and numerical methods for CFD modeling.
• Procedures of reporting the work using the CFD as a tool.
• An example of validating CFD simulation in a full scale pig barn.

Computational Fluid Dynamics (CFD) is increasingly used to study airflow around and in livestock buildings, to develop technologies to mitigate emissions and to predict the contaminant dispersion from livestock buildings. In this paper, an example of air flow distribution in a room with two full scale pig barns was simulated to show the procedures of validating a CFD simulation in livestock buildings. After summarizing the guideline and/or best practice for CFD modeling, the authors addressed the issues related to numerical methods and the governing equations, which were limited to RANS models. Although it is not necessary to maintain the same format of reporting the CFD modeling as presented in this paper, the authors would suggest including all the information related to the selection of turbulence models, difference schemes, convergence criteria, boundary conditions, geometry simplification, simulating domain etc. This information is particularly important for the readers to evaluate the quality of the CFD simulation results.