Simulation of phosphine flow in vertical grain storage : a preliminary numerical study

Mat Isa, Zaiton, Fulford, Glenn, & Kelson, Neil A. (2011) Simulation of phosphine flow in vertical grain storage : a preliminary numerical study. ANZIAM Journal, 52, C759-C772.

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To fumigate grain stored in a silo, phosphine gas is distributed by a combination of diffusion and fan-forced advection. This initial study of the problem mainly focuses on the advection, numerically modelled as fluid flow in a porous medium. We find satisfactory agreement between the flow predictions of two Computational Fluid Dynamics packages, Comsol and Fluent. The flow predictions demonstrate that the highest velocity (>0.1 m/s) occurs less than 0.2m from the inlet and reduces drastically over one metre of silo height, with the flow elsewhere less than 0.002 m/s or 1% of the velocity injection. The flow predictions are examined to identify silo regions where phosphine dosage levels are likely to be too low for effective grain fumigation.

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ID Code: 57087
Item Type: Journal Article
Refereed: Yes
Keywords: fumigation, phosphene, silo, computational fluid dynamics
ISSN: 1446-1811
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Solution of Differential and Integral Equations (010302)
Australian and New Zealand Standard Research Classification > AGRICULTURAL AND VETERINARY SCIENCES (070000) > CROP AND PASTURE PRODUCTION (070300) > Crop and Pasture Post Harvest Technologies (incl. Transportation and Storage) (070307)
Divisions: Current > QUT Faculties and Divisions > Division of Technology, Information and Learning Support
Current > Research Centres > High Performance Computing and Research Support
Current > Schools > School of Mathematical Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 11 Feb 2013 00:47
Last Modified: 11 Jul 2013 04:34

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