Modelling of ammonia emissions from naturally ventilated livestock buildings. Part 3: CFD modelling

Bjerg, Bjarne; Cascone, Giovanni; Lee, In-Bok; Bartzanas, Thomas; Norton, Tomás; Hong, Suk-Jin; Seo, Il Won; Banhazi, Thomas; Liberati, Paolo; Marucci, Alvaro; Zhang, Guoqiang

doi:10.1016/j.biosystemseng.2013.06.012

Cited by 75 publications

(34 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, the barn airflow patterns were assumed to be turbulent and the k-ε model was applied to solve for the kinetic energy (k) and the viscous dissipation rate of turbulent energy (ε). This model makes a good representation of the turbulent nature of fluid flow within controlled environments (Mistriotis et al, 1997;Norton et al, 2009), and it is one of the most commonly used (Bjerg et al, 2013).…”

Section: Methodsmentioning

confidence: 99%

Thermal and ammonia concentration gradients in a rabbit barn with two ventilation system designs

Flores-Velázquez

Villarreal‐Guerrero

Ojeda-Bustamante

et al. 2017

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

A B S T R A C TRabbit barns are of economic importance in central Mexico, where rabbit breeders use rustic buildings for production. In such barns, climate conditioning is mostly based on natural ventilation (NV) where the lack of a well-designed NV system may be a limiting factor. In this study, computational fluid dynamics was used to analyse the performance of the NV system in a 24 x 4 x 4.8 m typical Central Mexico rabbit barn with a density of 20 rabbits m -2 of cage. The barn included both side vents at 1.2 m in height from the ground. Results indicated exchange rates of 0.052 and 2.9 x 10 -4 m 3 m -2 s -1 when the wind direction was simulated as orthogonal and parallel to the side vents, respectively, suggesting the orthogonal direction favoured the exchange rate. However, such conditions produced an accumulation of ammonia underneath the rabbit cages. Thus, a design modification including a lower inlet vent was analysed. Such modification substantially decreased the concentration gradients of temperature and ammonia.Gradientes de temperatura e concentração de amônia em fazenda cunícula com dois sistemas de ventilação R E S U M O A produção de coelhos em sistemas intensivos é importante para a economia da região central do México, onde os criadores usam instalações rústicas para produção. O acondicionamento climático nesse tipo de instalação ocorre, basicamente, por ventilação natural; no entanto, a arquitetura desses galpões é fator limitante para uma ventilação eficiente. Neste trabalho foi usada Dinâmica Computacional de Fluido para analisar o desempenho da ventilação natural em um típico galpão de 24 x 4 x 4,8 m construído na parte central do México. Foi usada uma densidade de 20 coelhos m -2 para as simulações. O galpão tinha dois lados de ventilação de 1.2 m de altura desde o solo. Os resultados indicaram taxas de câmbio de 0,052 e 2,9 x 10 -4 m 3 m -2 s -1 quando se simulou a direção do vento em ortogonal e paralelo às saídas de ar resultando em zero de concentração sobre as gaiolas; porém uma acumulação de gás ocorreu abaixo das gaiolas devido a uma distribuição não uniforme do ar. Com base nos resultados foram realizadas modificações na arquitetura das instalações, incluindo a abertura de entrada de vento na parte inferior do galpão. Tais modificações permitiram diminuir, notoriamente, os gradientes de concentração térmica e amoníaco.

show abstract

Section: Methodsmentioning

confidence: 99%

Thermal and ammonia concentration gradients in a rabbit barn with two ventilation system designs

Flores-Velázquez

Villarreal‐Guerrero

Ojeda-Bustamante

et al. 2017

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

show abstract

“…Applications include pedestrian-level wind conditions [37,[39][40][41][42], pollutant dispersion [43][44][45][46][47], wind-driven rain [48,49], natural ventilation [50][51][52][53] and thermal environment in urban areas . An overview of 24 previous CFD studies on the thermal environment in urban areas is provided in Table 1, distinguishing between mesoscale and microscale studies.…”

Section: Introductionmentioning

confidence: 99%

CFD simulation and validation of urban microclimate: A case study for Bergpolder Zuid, Rotterdam

Toparlar

Blocken

Vos

et al. 2015

Building and Environment

260

104

View full text Add to dashboard Cite

“…For example, in dairy cattle there are interesting papers on ventilation from the Aarhus University (Wu et al, 2012;Shen et al, 2013) or research on ammonia emissions (Sun et al, 2002;Bjerg et al, 2013) (Predicala and Maghirang, 2003;Mossad, 2009;Tong et al, 2013), poultry (Pawar et al, 2010;Zajicek and Kic, 2012;Bustamante et al, 2013) or rabbit (Flores-Velázquez et al, 2013). A paper on trends regarding research on livestock pollutant emissions, including CFDs, has been recently published (Takai et al, 2013) (Figure 2).…”

Section: Computational Fluid Dynamics In Buildings and Infrastructurementioning

confidence: 99%

Present and future of the numerical methods in buildings and infrastructures areas of biosystems engineering

Ayuga

2015

J Agricult Engineer

View full text Add to dashboard Cite

Biosystem engineering is a discipline resulting from the evolution of the traditional agricultural engineering to include new engineering challenges related with biological systems, from the cell to the environment. Modern buildings and infrastructures are needed to satisfy crop and animal production demands. In this paper a review on the status of numerical methods applied to solve engineering problems in the field of buildings and infrastructures in biosystem engineering is presented. The history and basic background of the finite element method is presented. This is the first numerical method implemented and also the more developed one. The history and background of other two more recent methods, with practical applications, the computer fluids dynamics and the discrete element method are also presented. Besides, a review on the scientific and professional applications on the field of buildings and infrastructures for biosystem engineering needs is presented. Today we can simulate engineering problems with solids, engineering problems with fluids and engineering problems with particles and get to practical solutions faster and cheaper than in the past. The paper encourages young engineers and researchers to make progress these tools and their engineering applications. The capacities of all numerical methods in their present development status go beyond the present practical applications. There is a broad field to work on it. IntroductionThe present paper is a review of the numerical methods at present and their applications in solving engineering problems. The field is too wide to be considered in a single article. This is why the paper focuses on presenting the fundamentals of the most significant numerical methods that can be applied for buildings and infrastructures areas of biosystems engineering. The three next numerical methods will be considered: i) finite element method (FEM); ii) computer fluid dynamics (CFD); iii) discrete element method (DEM).In the paper the main features of these methods will be presented along with showing some examples in areas of biosystems engineering. Modern engineering can be considered to begin with the industrial revolution in the late eighteenth and early nineteenth century. From the very beginning, it has used the most powerful mathematical tools of the time in order to solve problems arising in practice. It was considered a fact that it was essential acquiring solid mathematical foundations for being a good engineer. The programs of studies from all Universities of the time prove it so. Even great figures on mathematics of the nineteenth and twentieth centuries were formally engineers. This symbiosis has produced good results for society. In the second half of XX Century, the fast development of computer science produced a great advance in numerical methods applied to physics and engineering.Based on this premise, the predictable future is that calculation and structural analysis in all fields of engineering will be based on modern numerical methods. This power...

show abstract

Modelling of ammonia emissions from naturally ventilated livestock buildings. Part 3: CFD modelling

Cited by 75 publications

References 70 publications

Thermal and ammonia concentration gradients in a rabbit barn with two ventilation system designs

Thermal and ammonia concentration gradients in a rabbit barn with two ventilation system designs

CFD simulation and validation of urban microclimate: A case study for Bergpolder Zuid, Rotterdam

Present and future of the numerical methods in buildings and infrastructures areas of biosystems engineering

Contact Info

Product

Resources

About