Validation of CFD Simulation for Ammonia Emissions from an Equeous Solution

Li Rong, Basman Elhadidib, Ezzat Khalifa, Peter V. Nielsen, Guoqiang Zhang

Research output: Contribution to journalJournal articleResearchpeer-review

13 Citations (Scopus)

Abstract

In order to model and predict ammonia emissions from animal houses, it is important to determine the concentration on the emission surface correctly. In the current literature, Henry’s law is usually used to model the mass transfer through the gas–liquid surface (e.g. manure or aqueous solution). The objective of this study is to investigate the accuracy of three models for Henry’s law constant (HLC) as well as functions derived from experimental vapor–liquid equilibrium (VLE) properties of ammonia water to determine the concentration on the liquid ammonia solutions surface in order to be used as boundary condition for CFD prediction of ammonia emission. The accuracy of CFD simulation depends on many factors. In this study, the effects of appropriate geometry model, inlet turbulent parameters and three turbulence models (low-Reynolds number k–ε model, renormalization group k–ε model and Shear Stress Transport k–w model) on ammonia emissions are investigated and discussed. Then the concentration boundary condition determined by different HLC models and the VLE model is validated by ammonia emissions and concentration profiles measured in the boundary layer. The results indicate that the current HLC models generally over-predict the ammonia emissions from aqueous solution in this study whereas VLE gives better agreement between simulated and measured results. A linear relation is observed between ammonia mass transfer coefficient obtained from the VLE relation and those from HLC models.
Original languageEnglish
JournalComputers and Electronics in Agriculture
Volume75
Issue number2
Pages (from-to)261–271
Number of pages11
ISSN0168-1699
DOIs
Publication statusPublished - 2011

Fingerprint

Ammonia
Computational fluid dynamics
ammonia
simulation
mass transfer
aqueous solutions
Mass transfer
boundary condition
Boundary conditions
aqueous solution
animal housing
Manures
Turbulence models
Reynolds number
Shear stress
shear stress
Boundary layers
Animals
manure
boundary layer

Keywords

  • Concentration boundary condition
  • Henry’s law constant
  • Vapor–liquid equilibrium
  • Ammonia emission
  • CFD

Cite this

Rong, Li ; Elhadidib, Basman ; Khalifa, Ezzat ; Nielsen, Peter V. ; Zhang, Guoqiang. / Validation of CFD Simulation for Ammonia Emissions from an Equeous Solution. In: Computers and Electronics in Agriculture. 2011 ; Vol. 75, No. 2. pp. 261–271.
@article{f48a1631468f4d158cbc53b230cdafd8,
title = "Validation of CFD Simulation for Ammonia Emissions from an Equeous Solution",
abstract = "In order to model and predict ammonia emissions from animal houses, it is important to determine the concentration on the emission surface correctly. In the current literature, Henry’s law is usually used to model the mass transfer through the gas–liquid surface (e.g. manure or aqueous solution). The objective of this study is to investigate the accuracy of three models for Henry’s law constant (HLC) as well as functions derived from experimental vapor–liquid equilibrium (VLE) properties of ammonia water to determine the concentration on the liquid ammonia solutions surface in order to be used as boundary condition for CFD prediction of ammonia emission. The accuracy of CFD simulation depends on many factors. In this study, the effects of appropriate geometry model, inlet turbulent parameters and three turbulence models (low-Reynolds number k–ε model, renormalization group k–ε model and Shear Stress Transport k–w model) on ammonia emissions are investigated and discussed. Then the concentration boundary condition determined by different HLC models and the VLE model is validated by ammonia emissions and concentration profiles measured in the boundary layer. The results indicate that the current HLC models generally over-predict the ammonia emissions from aqueous solution in this study whereas VLE gives better agreement between simulated and measured results. A linear relation is observed between ammonia mass transfer coefficient obtained from the VLE relation and those from HLC models.",
keywords = "Concentration boundary condition, Henry’s law constant, Vapor–liquid equilibrium, Ammonia emission, CFD, Concentration boundary condition, Henry’s law constant, Vapor–liquid equilibrium, Ammonia emission, CFD",
author = "Li Rong and Basman Elhadidib and Ezzat Khalifa and Nielsen, {Peter V.} and Guoqiang Zhang",
year = "2011",
doi = "10.1016/j.compag.2010.12.002",
language = "English",
volume = "75",
pages = "261–271",
journal = "Computers and Electronics in Agriculture",
issn = "0168-1699",
publisher = "Elsevier",
number = "2",

}

Validation of CFD Simulation for Ammonia Emissions from an Equeous Solution. / Rong, Li; Elhadidib, Basman; Khalifa, Ezzat; Nielsen, Peter V.; Zhang, Guoqiang.

In: Computers and Electronics in Agriculture, Vol. 75, No. 2, 2011, p. 261–271.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Validation of CFD Simulation for Ammonia Emissions from an Equeous Solution

AU - Rong, Li

AU - Elhadidib, Basman

AU - Khalifa, Ezzat

AU - Nielsen, Peter V.

AU - Zhang, Guoqiang

PY - 2011

Y1 - 2011

N2 - In order to model and predict ammonia emissions from animal houses, it is important to determine the concentration on the emission surface correctly. In the current literature, Henry’s law is usually used to model the mass transfer through the gas–liquid surface (e.g. manure or aqueous solution). The objective of this study is to investigate the accuracy of three models for Henry’s law constant (HLC) as well as functions derived from experimental vapor–liquid equilibrium (VLE) properties of ammonia water to determine the concentration on the liquid ammonia solutions surface in order to be used as boundary condition for CFD prediction of ammonia emission. The accuracy of CFD simulation depends on many factors. In this study, the effects of appropriate geometry model, inlet turbulent parameters and three turbulence models (low-Reynolds number k–ε model, renormalization group k–ε model and Shear Stress Transport k–w model) on ammonia emissions are investigated and discussed. Then the concentration boundary condition determined by different HLC models and the VLE model is validated by ammonia emissions and concentration profiles measured in the boundary layer. The results indicate that the current HLC models generally over-predict the ammonia emissions from aqueous solution in this study whereas VLE gives better agreement between simulated and measured results. A linear relation is observed between ammonia mass transfer coefficient obtained from the VLE relation and those from HLC models.

AB - In order to model and predict ammonia emissions from animal houses, it is important to determine the concentration on the emission surface correctly. In the current literature, Henry’s law is usually used to model the mass transfer through the gas–liquid surface (e.g. manure or aqueous solution). The objective of this study is to investigate the accuracy of three models for Henry’s law constant (HLC) as well as functions derived from experimental vapor–liquid equilibrium (VLE) properties of ammonia water to determine the concentration on the liquid ammonia solutions surface in order to be used as boundary condition for CFD prediction of ammonia emission. The accuracy of CFD simulation depends on many factors. In this study, the effects of appropriate geometry model, inlet turbulent parameters and three turbulence models (low-Reynolds number k–ε model, renormalization group k–ε model and Shear Stress Transport k–w model) on ammonia emissions are investigated and discussed. Then the concentration boundary condition determined by different HLC models and the VLE model is validated by ammonia emissions and concentration profiles measured in the boundary layer. The results indicate that the current HLC models generally over-predict the ammonia emissions from aqueous solution in this study whereas VLE gives better agreement between simulated and measured results. A linear relation is observed between ammonia mass transfer coefficient obtained from the VLE relation and those from HLC models.

KW - Concentration boundary condition

KW - Henry’s law constant

KW - Vapor–liquid equilibrium

KW - Ammonia emission

KW - CFD

KW - Concentration boundary condition

KW - Henry’s law constant

KW - Vapor–liquid equilibrium

KW - Ammonia emission

KW - CFD

U2 - 10.1016/j.compag.2010.12.002

DO - 10.1016/j.compag.2010.12.002

M3 - Journal article

VL - 75

SP - 261

EP - 271

JO - Computers and Electronics in Agriculture

JF - Computers and Electronics in Agriculture

SN - 0168-1699

IS - 2

ER -