CFD study of the influence of laying hen geometry, distribution and weight on airflow resistance

李保明

中国农业大学

摘要：Proper indoor environment is essential to the production performance of laying hens, one effective approach to research it was Computational Fluid Dynamics (CFD). However, the modelling is a great issue as modelling individual hen would generate large number of mesh, an alternative is to simplify caged laying hen occupied zone (CZ) into porous media zone. As for it, the flow resistance of CZ requires firstly to calculate the resistance coefficients. In this study, CFD simulation was applied to calculate the resistance in three directions perpendicular to each other. The effect of the hen model geometry (full-geometry, ellipsoidal and body only model in which hen’s head, neck and legs were neglected), spatial distribution (four, three and two hens stand near the feeding through, respectively) and body weight (1.5 kg, 1.8 kg and 2.0 kg) were investigated on flow resistance. Finally, the resistance coefficients were obtained under different situations.

关键词:报告,报告,Caged laying hens occupied zones; Porous media; Flow resistance; Resistant coefficient; CFD

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