Study of mesh refinement and comparison of two turbulence models applied to the installation of pregnant female pigs

• Grant number: 15/00084-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): April 01, 2015
• Effective date (End): March 31, 2016
• Field of knowledge: Agronomical Sciences - Agricultural Engineering - Rural Buildings and Ambience
• Principal Investigator: José Roberto Nunhez
• Grantee: Nayra Oliveira Brachi
• Host Institution: Faculdade de Engenharia Química (FEQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

With the expansion of pork production in Brazil, the need to increase and automate installations for these animals was necessary. However, there are challenges, becoming necessary keeping uniform and appropriate conditions of the internal environment, with limited resources for g read facilities, intensive, productive and maintaining quality. To this end , such installations have as function keep the environment suitable and controlled for those animals, promoting comfort zones, removing harmful gases produced and excreted by the animals themselves and dust . Therefore, the analysis of air flow pattern should be done based on the geometry and construction of the installation, size and inputs and outputs distribution of ventilation and heat production. Numerical modeling techniques, such as, Fluid Dynamics Computational (Computational Fluid Dynamics, CFD) may offer an effective means to quantify precisely internal climate variables ventilated facilities under various design conditions in a virtual environment. Consequently, the physical experiments are minimized considerably. As already used in chemical industries, aerospace and hydrodynamics, CFD proved to be very efficient in developing simulation temporal, spatial and fluid pressure, temperature and speed fluid. The aim of this study is analyze simulations from the facilities of pigs in gestation phase creation, in sense of findind What parameters represent the best air flowing inside these inner farms, comparing the accuracy of models of turbulence between k µ ( k Epsilon ) and Shear Stress Transport ( SST ) for predict the air flow, computational time and waste (RMS ) ,in simulations in the creation of sows in gestation facilities. Also, as the simulation accuracy, will be analyzed the mesh refinement on Inputs and Outputs air. To this end, it will be necessary to compare a simulation created by the CFD and the corresponding situation in a real environment, respecting the premises parameters.