Modelling of animal occupied zones in CFD

Iqbal, Ahsan; Gautam, Khem Raj; Zhang, G.; Rong, Li

doi:10.1016/j.biosystemseng.2021.01.022

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…In other words, the ventilation system manages to keep temperatures limited on average, but hotspots are present. The creation of stagnation zones due to internal walls is visible in simulation results by Zhou et al [15], while hotspots due to animal thermal load were previously reported by Iqbal et al [35]. In summer conditions, wind is also present, and it induces a relevant drifting effect on upwind lines of fans.…”

Section: Simulations In Summer Weathermentioning

confidence: 64%

“…Animal shape was not depicted in the simulation, but thermal load was considered as uniformly distributed energy and water sources. This approach was already used in the literature by Iqbal et al [35] and validated against the surface description approach. The animal thermal load was computed starting from a daily-averaged energy balance.…”

Section: Animal Thermal Modellingmentioning

confidence: 99%

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A CFD Methodology for the Modelling of Animal Thermal Welfare in Hybrid Ventilated Livestock Buildings

Colombari,

Masoero,

Della Torre

2024

AgriEngineering

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Computational fluid dynamics (CFD) may aid the design of barn ventilation systems by simulating indoor cattle thermal welfare. In the literature, CFD models of mechanically and naturally ventilated barns are proposed separately. Hybrid ventilation relies on cross effects between air change mechanisms that cannot be studied using existing models. The objective of this study was to develop a CFD methodology for modelling animal thermal comfort in hybrid ventilated barns. To check the capability of CFD as a design evaluation tool, a real case study (with exhaust blowers) and an alternative roof layout (with ridge gaps) were simulated in summer and winter weather. Typical phenomena of natural and mechanical ventilation were considered: buoyancy, solar radiation, and wind together with high-speed fans and exhaust blowers. Cattle thermal load was determined from a daily animal energy balance, and the assessment of thermal welfare was performed using thermohygrometric indexes. Results highlight that the current ventilation layout ensures adequate thermal welfare on average, despite large nonuniformity between stalls. The predicted intensity of heat stress was successfully compared with experimental measurements of heavy breathing duration. Results show strong interactions between natural and mechanical ventilation, underlining the need for an integrated simulation methodology.

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Section: Simulations In Summer Weathermentioning

confidence: 64%

Section: Animal Thermal Modellingmentioning

confidence: 99%

A CFD Methodology for the Modelling of Animal Thermal Welfare in Hybrid Ventilated Livestock Buildings

Colombari,

Masoero,

Della Torre

2024

AgriEngineering

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“…In Rong et al [20] the authors summarize the best practice guidelines for CFD modeling in livestock buildings to ensure prediction quality. Taking the advantages of CFD techniques, this methodology have been also used to simulate the indoor air flow in animal buildings, namely in pig [21,22], cattle [23], and, in particular, poultry housing [17,24]. In Eva Galdo (2017) [19], a review of animal buildings' CFD simulations is presented.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Modeling of Ammonia Concentration in a Commercial Broiler Building

2023

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In the present study, a numerical model was developed to predict the flow pattern inside a broiler building. The model was intended to predict the velocity fields inside the domain and the ammonia (NH3) emitted or released by litter from poultry housing. The numerical model was developed in computational fluid dynamics (CFDs) commercial code and intended to represent a commercial broiler building and to simulate the 3D and heat transfer in steady-state flow. The evaporative cooling pads were also included in the model. The validation of the model was based on experimental measurements obtained in previous studies. The simulations were focused on the summer, winter, and mid-season conditions. Numerical measurements of NH3 concentration were compared with the experimental measurements, and a quite good agreement was verified. The numerical results allowed the characterization of: the inside flow pattern developed for the summer and winter periods and the NH3 and velocity field distributions inside the broiler building. It was found that NH3 concentration increased along the tunnel, as a result, especially, of the low flow rate of the exhaust fan. It was verified that the low velocities inside domain were not sufficient to remove the gaseous pollutants.

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“…In Rong et al, [19] the authors summarize the best practice guidelines for CFD modeling in livestock buildings to ensure prediction quality. Taking the advantages of CFD techniques, this methodology have been also used to simulate the indoor air flow on animal buildings, namely in pig housing [20,21], in cattle housing [22], and in particular in poultry housing [16,23]. In Eva Galdo (2017) [18], a review of animal buildings CFD simulations is presented.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Modeling of Ammonia Concen-Tration in a Commercial Broiler Building

Gonçalves¹,

Lopes²,

Pereira³

2023

Preprint

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In the present study, a numerical model was developed to predict the flow pattern inside a broiler building. The model intends to predict the velocities fields inside the domain and ammonia (NH3) emitted or released by litter from poultry housing. The numerical model developed in Computational Fluid Dynamics (CFD) commercial code, intends to represent a commercial broiler building, and intends to simulate the 3D and heat transfer, in steady state flow. The evaporative cooling pads were also included in the model. The validation of the model was based in experimental measurements obtained in previous studies. The simulations were focused on Summer, Winter and also Mid-Season situation. The numerical results of NH3 concentration were compared with the experimental measurements, and a quite good agreement was verified. The numerical results allowed the characterization of: the inside flow pattern developed for the summer and winter situation; the inside NH3 distribution, and the velocity field distribution inside the broiler building. It was found that NH3 concentration increases along the tunnel, especially in low flow rate imposed from the exhaust fan. Also, it was verified that the low velocities inside domain are no sufficient to remove the gaseous pollutants.

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Modelling of animal occupied zones in CFD

Cited by 9 publications

References 15 publications

A CFD Methodology for the Modelling of Animal Thermal Welfare in Hybrid Ventilated Livestock Buildings

A CFD Methodology for the Modelling of Animal Thermal Welfare in Hybrid Ventilated Livestock Buildings

Computational Fluid Dynamics Modeling of Ammonia Concentration in a Commercial Broiler Building

Computational Fluid Dynamics Modeling of Ammonia Concen-Tration in a Commercial Broiler Building

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