Search Results - "Langston, P.A."

A continuum model of stresses in a vertical silo with a flow channel in the vicinity of the wall, using the principal stress cap surface approach for the bulk solids by Matchett, A.J., Langston, P.A., McGlinchey, D.

“…[Display omitted] •Silos with a flow channel at the wall have been modelled.•3-zones were used, as in Eurocode 1 (2006).•The principal stress cap method was…”
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A “principal stress cap” model for stresses in a circular silo with an off-centre circular core: Finite core models, including filled silos, incipient flow and switch stresses by Matchett, A.J., Langston, P.A., McGlinchey, D.

“…•Silos with offset cores have been modelled.•Incipient flow and switch stress have been simulated.•Passive, convex and active, concave principal stress caps…”
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A model for stresses in a circular silo with an off-centre circular core, using the concept of a principal stress cap: Solution for a completely filled silo and comparison with Janssen and DEM data by Matchett, A.J., Langston, P.A., McGlinchey, D.

“…•Eccentric stresses in circular silos cause serious damage.•We model eccentric stresses in silos using 3-D principal stress cap surfaces.•Boundary conditions…”
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Discrete element simulation of granular flow in 2D and 3D hoppers: Dependence of discharge rate and wall stress on particle interactions by Langston, P.A., Tüzün, U., Heyes, D.M.

“…Discrete element Newtonian dynamics simulations have been carried out of filling and discharge under gravity of non-cohesive discs (in two dimensions) and…”
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Validation tests on a distinct element model of vibrating cohesive particle systems by Asmar, B.N., Langston, P.A., Matchett, A.J., Walters, J.K.

“…The discrete element method (DEM) is becoming widely used to simulate granular flows. This method simulates the individual dynamics of all particles in an…”
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Particle and droplet size analysis from chord measurements using Bayes' theorem by Langston, P.A, Burbidge, A.S, Jones, T.F, Simmons, M.J.H

“…A method of predicting sphere diameter distributions from chord size data is presented and evaluated. This is the probability apportioning method (PAM2) and is…”
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Discrete element simulation of internal stress and flow fields in funnel flow hoppers by Langston, P.A., Tüzün, U., Heyes, D.M.

“…Newtonian dynamics simulations have been carried out for the filling and discharge of funnel flow hoppers under both plane-strain (2D) and axially-symmetric…”
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Corrigendum to “A model for stresses in a circular silo with an off-centre circular core, using the concept of a principal stress cap: Solution for a completely filled silo and comparison with Janssen and DEM data” [Chem. Eng. Res. Des. 93 (2015) 330–348] by Matchett, A.J., Langston, P.A., McGlinchey, D.

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Corrigendum to “A “principal stress cap” model for stresses in a circular silo with an off-centre circular core: Finite core models, including filled silos, incipient flow and switch stresses” [Chem. Eng. Res. Des. 106 (2016) 263–282] by Matchett, A.J., Langston, P.A., McGlinchey, D.

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Corrigendum to “A continuum model of stresses in a vertical silo with a flow channel in the vicinity of the wall, using the principal stress cap surface approach for the bulk solids” [Chem. Eng. Res. Des. 122 (2017) 211–225] by Matchett, A.J., Langston, P.A., McGlinchey, D.

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Distinct element simulation of interstitial air effects in axially symmetric granular flows in hoppers by Langston, P.A., Tüzün, U., Heyes, D.M.

“…Two-phase flow of interstitial air in a moving packed bed of granular solids is modelled using a distinct element (DE) technique which considers the Newtonian…”
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Distinct element modelling of non-spherical frictionless particle flow by Langston, Paul A, Al-Awamleh, Mohammad A, Fraige, Feras Y, Asmar, Basel N

“…The Discrete Element Method (DEM) is becoming widely used to simulate particle flows. It is a versatile and powerful tool. Its main limitation, the CPU time…”
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Integration schemes and damping algorithms in distinct element models by Fraige, F.Y., Langston, P.A.

“…Computational run times in distinct element method (DEM) simulations of granular flow can be large and limit the size of the system being modeled. Hence, it is…”
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Introduction to particulate mechanics on the basis of the single particle equivalent concept by Langston, P.A.

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Comparison of least-squares method and Bayes’ theorem for deconvolution of mixture composition by Langston, Paul A

“…A method of de-convoluting a mixture composition from a set of property data for the mixture is presented and evaluated. This is the probability apportioning…”
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Particle and droplet size analysis from chord distributions by Simmons, M.J.H., Langston, P.A., Burbidge, A.S.

“…Two methods of estimating particle or droplet size distributions from chord measurements are presented and evaluated. The first is a probability apportioning…”
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Dynamic measurement for the stiffness of loosely packed powder beds by Yanagida, T., Matchett, A. J., Coulthard, J. M., Asmar, B. N., Langston, P. A., Walters, J. K.

“…An experimental methodology to measure the stiffness of loosely packed powder beds was developed, which had not been possible using previous methods…”
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Energy monitoring in distinct element models of particle systems by Asmar, B.N., Langston, P.A., Matchett, A.J., Walters, J.K.

“…This paper describes techniques for monitoring energy in discrete element method (DEM) simulations of granular flow. They have been applied to DMX a…”
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Microstructural simulation and imaging of granular flows in two- and three-dimensional hoppers by Langston, P.A., Nikitidis, M.S., Tüzün, U., Heyes, D.M., Spyrou, N.M.

“…Distinct element simulations of granular flows in two- and three-dimensional hoppers are compared with imaging data from conventional photography and gamma-ray…”
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Modeling particle settling behavior using the discrete element method by Asmar, B.N., Langston, P.A., Matchett, A.J.

“…The discrete element model DMX was used to simulate the settling behavior of a unique particle in an assembly of other particles in a hopper filling process…”
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