Air traverse time in grain bins

Smith, Edward A.; Jayas, Digvir S.

doi:10.1016/j.apm.2004.03.006

Cited by 5 publications

(2 citation statements)

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“…They assumed a uniform vertical flow and obtained an analytic solution using a perturbation approach based on the small curvature of streamlines. In [19], the same author used conformal mapping to obtain the gas pressure via the solution of Laplace Equation. They considered a rectangular symmetrical bin and instead of a point source at the inlet, the gas entered the bin as a finite curved shape at constant pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the above literatures, several analytical solutions have been obtained for air or fumigant flow in grain beds where the pressure, velocity, streamline, and traverse time have been calculated. The grain storage is assumed whether as a two dimensional planar [14,15,16,19], 2D axisymmetric (cylindrical storage) [15,17,18,20,25] or a three-dimensional domain [21,22,23,24,26]. However, none investigated the geometrical configurations considered in this present study which are physically reliable finite size inlet on the base of a cylindrical storage.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Gas Flow through a Cylindrical Grain Storage

Isa

Nazri

Idris

2022

Mal. J. Fund. Appl. Sci.

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This study is concerned with a process known as fumigation in the grain industry. During this process, fumigant is injected at the inlet of storage and is expected to distribute throughout the stored grain to kill the insects in it. The present research focuses on the study of the fumigant (phosphine) flow distribution based on mathematical modelling and numerical simulation through available Computational Fluid Dynamic (CFD) software. In particular, the mathematical modelling is translated into the CFD and simulation is ran to determine areas where insects might find refuge. Hence provide information for conducting more effective fumigation. Numerical simulation using CFD software, for example, FLUENT, is widely known as cost and time effective. However, the numerical simulation needs to be verified before conducting such studies. For a simple case, the analytical solution exists. Therefore, the analytic solution for a simple case, can be used for verification and serve as a basis for adopting a CFD software, FLUENT for an extended geometry and boundary conditions. The numerical results are found to agree well with the analytical results. Overall, the fumigant gas flows towards the outlet regardless of the position of the outlet.

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Section: Introductionmentioning

confidence: 99%