Computational Fluid Dynamics Investigation on Airflow Distribution in Negative Pressure Ventilation of Close-House Cage Poultry Building

Livestock farming is essential to supporting Indonesia’s economic development and accomplishing Sustainable Development Goals (SDGs). Farming produces water pollution, animal waste, odor, and contaminant gases. High concentrations of contaminant gases harm animals’ and humans’ health around the farms. Close-house cages for the intensification programs must have good air circulation and sanitation. The cage’s construction design, HVAC system selection, and climatic conditions determine the air circulation system. Numerical simulation results illustrate the velocity and temperature distribution precisely. The preference of suitable boundary conditions is crucial to obtain accurate results. Research is conducted to determine the suitable configuration of inlet-outlet boundary conditions for illustrating fluid flow distribution in a close-house cage equipped with exhaust fans. The 3D steady-state model is run in ANSYS with the SST k-ω turbulence with SIMPLE Second-order Discretization. The research results show that the configuration of the inlet-outlet boundary condition, pressure inlet-pressure outlet, accurately describes the airflow distribution.