A CASE STUDY OF AIRFLOW PATTERNS AROUND AN ARCHED TYPE AGRICULTURAL BUILDING: INVESTIGATING MESH CONVERGENCE OF DIFFERENT TURBULENCE MODELS

Livestock production buildings are a source of ammonia and greenhouse gas emissions.
The transport mechanism of gas dispersions depends on a better understanding of airflow patterns surrounding agricultural buildings.
With rapid development of technology of computational fluid dynamics (CFD), it becomes more and more popular to study the wind field and pollutant dispersion from agricultural buildings.
In this paper, CFD was used to investigate the airflow patterns around a building with an arched type roof.
The steady turbulence models were used to handle the turbulent motions.
To make a qualified simulation, mesh convergence should be achieved for different turbulence models.
An index called Grid Convergence Index as well as wall y+ and vortices shape size ratio were considered to evaluate mesh independence for different turbulence models.
Results show all these three parameters could assist grid refinement to a certain degree.

Ist International Symposium on CFD Applications in Agriculture

C. Zong, W. Wu, G.-Q. Zhang , X. Shen, G. Ntinas

computational fluid dynamics (CFD), grid convergence index, grid refinement, simulation

https://doi.org/10.17660/ActaHortic.2013.1008.8