Modelling of internal environmental conditions in a full-scale commercial pig house containing animals

Simulation Analysis of a Ventilation System in a Smart Broiler Chamber Based on Computational Fluid Dynamics

“…Comparing the results of the two, it was found that the standard mean square error between the simulated values by the RNG k-ε turbulence model and the measured values was less than 0.25 and that the simulated values were more accurate [14]. Cheng et al [17] explored the effects of flow resistance by considering the geometry of the broiler models (full geometry, ellipsoid, and maternal model in From Figure 8, it can be seen that the simulation results of the body only model and the block model have good consistency, and the trend is consistent. The average absolute error between the body only model and the block model was 0.12, and the error between the two sets of simulation values was small, indicating that the impact on the wind field in the broiler chamber was approximate.…”

“…Comparing the results of the two, it was found that the standard mean square error between the simulated values by the RNG k-ε turbulence model and the measured values was less than 0.25 and that the simulated values were more accurate [14]. Cheng et al [17] explored the effects of flow resistance by considering the geometry of the broiler models (full geometry, ellipsoid, and maternal model in which the head, neck, and legs were ignored) and spatial distribution. In the wind tunnel experiment, five full geometric models were used to represent the broilers, and the model verification was performed using numerical simulation.…”

“…They concluded that the result by RNG (the renormalization group) k-ε is more accurate for the full geometry model.Sun et al [16] applied PIV (particle image velocimetry) technology to the research of a broiler house. Seo et al [17] simulated the ventilation conditions of the broiler houses with natural ventilation in winter by CFD technology, and improved the original ventilation scheme based on the simulation results. The numerical simulation results shown by the previous researchers have indicated that the relative error of the RNG k-ε turbulence model is the smallest among the turbulence models selected.…”

Assessment of porous media instead of slatted floor for modelling the airflow and ammonia emission in the pit headspace

“…For such a typical dairy cow house, 60-70% of the ammonia is emitted from the slatted floor surface (Monteny et al, 1998;Braam et al, 1997). Therefore, much effort has been devoted to study the ammonia emission behaviour in the space above the slatted floor, both experimentally and numerically (Norton et al, 2009(Norton et al, , 2010Wu et al, 2012a;Rong et al, 2015;Seo et al, 2012;Snoek et al, 2014). The remaining ammonia emission from the dairy cow house, 30-40% of the total, originates from the slurry pit.…”

Computational fluid dynamics analysis of the thermal distribution of animal occupied zones using the jet-drop-distance concept in a mechanically ventilated broiler house

“…Accordingly, CFD has been widely used for ventilation and dispersion analysis of agricultural facilities, such as greenhouses, livestock houses and storage. This numerical method has been regarded as a powerful and versatile tool for analysing complex phenomena, such as turbulent flow or heat transfer, according to various environmental conditions (Bitog et Height of slot opening center above the floor (m) b i o s y s t e m s e n g i n e e r i n g 1 3 6 ( 2 0 1 5 ) 5 1 e6 8 Norton, Sun, Grant, Fallon, & Dodd, 2007;Norton, Grant, Fallon, & Sun, 2010;Seo et al, 2009Seo et al, , 2012Wu, Zhai, Zhang, & Nielsen, 2012). In this study, CFD could overcome experimental limitations, obtain data according to various experimental conditions and analyse the airflow pattern in a quantitative and qualitative manner.…”