Using computational fluid dynamics to develop positive-pressure precision ventilation systems for large-scale dairy houses

Jung, Seunghyeon; Chung, Hanwook; Mondaca, Mario R.; Nordlund, Ken; Choi, Christopher Y.

doi:10.1016/j.biosystemseng.2023.02.003

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Usually, the software used for CFD simulations is commercial. Among these, for modeling animal facilities can be highlighted the Ansys ® CFX [28,29,36,[40][41][42][43], Ansys ® Fluent [15,16,19,20,31,35,39,[44][45][46], and the Simcenter STAR-CCM+ [13,47].…”

Section: Software Usedmentioning

confidence: 99%

“…This model adds extra stress (Reynolds stress) to the viscosity (µ T ), relating the turbulent kinetic energy (k) to its dissipation (ε) [28,36,72]. In modeling animal facilities, the standard k-ε model is usually used in conjunction with an improved treatment (refinement) near the walls [19,20,29,45].…”

Section: Boundary Conditions and Simulation Schemesmentioning

confidence: 99%

“…[23]. One of the most common visualizations that yields the results in studies of animal facilities using CFD is the contour planes (horizontal and/or vertical), which is applied in several studies [20,36,42,46]. In this case, the horizontal and/or longitudinal profiles of the interest variable (temperature, humidity, air velocity, thermal comfort indexes, gas concentrations, etc.)…”

Section: Post-processing and Model Validationmentioning

confidence: 99%

“…By conducting evaluation studies of the thermal and bedding environments in CBP systems with open sides, it is expected that it will be possible to obtain detailed information about their operation, identify design and management failures, and propose and make available innovative solutions to producers [17,18]. Preferably, the studies should be carried out at the field level in typical facilities and with the presence of animals, but, taking into consideration that these are large-scale facilities, it is important to remember that conducting experiments is expensive and difficult [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its versatility, the CFD technique has been increasingly applied for modeling airflow and moisture conditions in agricultural facilities, being considered an ideal complement for field measurements [27]. In dairy cattle facilities, particularly the use of CFD for heat and mass transfer modeling has been widely used to evaluate and understand the behavior of thermal environmental conditions [14][15][16]19,20,26,[28][29][30][31]. The expressive majority of CFD modeling studies in dairy cattle facilities were carried out on typical conditions of collective housing systems in individual stalls (Free Stall).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Heat and Mass Transfer in Compost-Bedded Pack Barns for Dairy Cows Using Computational Fluid Dynamics: A Review

Oliveira,

Tinôco,

Sousa

et al. 2023

Applied Sciences

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To ensure a supply of dairy products, modern dairy farming has assumed an intensive nature, characterized by production in collective facilities with the presence of thermal conditioning, some automation level, and high-use inputs. Among the systems used for dairy cattle confinement, Compost-Bedded Pack Barns (CBPs) have been gaining importance and increasingly have been used in recent decades. CBPs must be designed and managed to ensure the best thermal comfort conditions throughout the year and, consequently, improve productivity, milk quality, and the health of the dairy herd. In this context, modeling via Computational Fluid Dynamics (CFD) emerges as a tool with huge potential for studying the thermal environmental conditions in the beds of CBPs, making it possible to improve projects and/or management practices in this kind of facility. This document is organized as a review, and its objective is to present the state of the art of the applicability of the CFD technique in the study of heat and mass transfer in CBP systems. So far, only four studies have used CFD for modeling CBP systems and have shown that the use of this tool helps to better understand the phenomena of heat and mass transfer in this kind of facility. Therefore, it is important that more studies using this technique in CBP systems be conducted, including additional considerations on constructive elements, animals, and the presence of beds in composting.

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