Storage and Flow of Solids
01 Jan 1964-
About: The article was published on 1964-01-01 and is currently open access. It has received 585 citations till now. The article focuses on the topics: Flow (mathematics).
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01 Jan 2017
TL;DR: Artykul opisuje takze porownanie wlaściwoścci mechanicznych i fizycznych trzech typow popiolow lotnych na pionowych przenośnikach wibracyjnych as mentioned in this paper.
Abstract: Przedmiotem artykulu jest transport trzech typow popiolow lotnych na pionowych przenośnikach wibracyjnych. Monitorowanym
zagadnieniem byl wplyw wlaściwości mechanicznych i fizycznych kazdego popiolu lotnego na skutecznośc transportu wibracyjnego
w kierunku pionowym. Badanym parametrem na trasie transportu byla efektywnośc transportu dla kazdego popiolu lotnego w tych
samych warunkach operacyjnych. Artykul opisuje takze porownanie wlaściwości mechanicznych i fizycznych trzech typow popiolow
lotnych pochodzących z roznych źrodel spalania wegla. Mierzono parametry mechaniczne i fizyczne: gestośc nasypowa, kąt tarcia
ściany, funkcja przeplywu, sklad ziarnowy oraz ksztalt ziarna. Patarmetry mechanicznych i fizycznych kazdego popiolu lotnego są
rozne, co wplywa na skutecznośc transportu za pomocą pionowego przenośnika wibracyjnego. Cechy mechaniczne i fizyczne materialow
uziarnionych sluzą jako glowne parametry wejściowe do projektowania systemu transportu lub skladowania.
1 citations
05 Mar 2020
TL;DR: This thesis concludes that the FEM modeling based on simple elasto-plastic constitutive model proves useful in predicting different hopper flow characteristics of particulate materials.
Abstract: Hopper systems of different shapes and sizes are widely used
in bulk solids industries to store and further process the particulate
material. Poor hopper design causes variety of problems and results in wastage
of resources. This dissertation investigates the applicability of finite
element method (FEM) based continuum modeling in predicting flow
characteristics of particulate materials discharging through hopper system. Throughout
the years, FEM has been implemented to simulate the shear failure of particulate
materials such as sand, glass beads, and pharmaceutical powders. The FEM
framework is based on the underlying constitutive model. Different constitutive
models are available in the literature to govern the behavior of particulate
materials. These models differ in their complexity, ease of implementation, and
have specific strengths and limitations. This work thoroughly investigates the
elasto-plastic constitutive models available in the commercial software Abaqus
in the context of hopper flow of particulate materials.
The thesis consists of three major parts, first part deals
with FEM modeling of cohesionless particulate materials and corresponding
verification of the hopper flow characteristics through comparison to
analytical theories and empirical correlations. The second part presents
quantitative comparison of FEM predicted flow characteristics to experimental
results for Ottawa sand discharging through concentric and eccentric bins. Particle
image velocimetry (PIV) experiments are conducted on a laboratory-scale bin to quantify
different flow characteristics. The last part deals with cohesive particulate
materials and presents a novel FEM approach for predicting the critical hopper
outlet opening to ensure uninterrupted discharge of the stored material.
This thesis concludes that the FEM modeling based on simple elasto-plastic
constitutive model proves useful in predicting different hopper flow
characteristics of particulate materials. The accuracy of FEM modeling depends
on detailed material characterization and corresponding implementation in Abaqus.
Some modifications need to be made in the elasto-plastic constitutive models to
accurately represent the bulk material behavior. The ideas presented in this
thesis can be applied to FEM modeling of other processing equipment such as the
rotating drum, screw-feeder, rotating blender/mixer etc.
01 Jan 2015
01 May 1977
TL;DR: By measuring the static and dynamic pressures of sand in a steel tube, the authors of as discussed by the authors have tested a new type of gauge for the pressure of a loose material on a wall, and the experimental data agree with the theretical results.
Abstract: By measuring the static and dynamic pressures of sand in a steel tube, the authors have tested a new type of gauge for the pressure of a loose material on a wall. The experimental data agree with the theretical results. During gravity flow of sand in a tube the dynamic pressures are pulsating and are greater than the static pressures.