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).
Citations
More filters
TL;DR: In this article, an analytical approach of continuous medium type which improves the theory of Janssen and other existing approaches of the same type is presented. But it does not consider the influence of the friction angles.
4 citations
TL;DR: In this paper, the flowability of fly ashes from sixteen grate-fired combustion plants (first-stage and second-stage de-dusting fly ash) was examined for flow relevant properties.
4 citations
TL;DR: In this paper, a direct experimental determination of the critical outlet dimensions without any assumptions has been carried out with the aid of a bunker-centrifuge, where gravity acceleration has been replaced by centrifugal acceleration adjustable in the range up to 100 times the gravity acceleration.
4 citations
TL;DR: In this article, discrete element simulations are performed to examine the kinematics of granular shear flows in an annular cell at high shearing rates, and the transition from partially to fully shearing flow is shown to depend on the particle diameter, solids concentration, and boundary conditions.
Abstract: Discrete element simulations are performed to examine the kinematics of granular shear flows in an annular shear cell at high shearing rates. The interstitial fluid is absent and gravity is included. To investigate the feasibility of using annular shear cells as rheometers for rapidly sheared dense granular materials, this study focuses on the coupled effect of boundary conditions and the relative particle to shear cell size. Four different particle diameters and three different boundary types are used in the same annular shear cell. These cases correspond to physical experiments reported earlier by the authors. For many cases both shearing and non-shearing regions coexist. The transition from partially to fully shearing flow is shown to depend on the particle diameter, solids concentration, and the boundary conditions. The particles form layers at high solids concentration and with larger particles, as evidenced by the reduction of the flow diffusivity. The slip velocity at the bottom boundary is absent; at the top it varies. This variation is sensitive to the type of boundaries but insensitive to bulk solids concentration. This study shows the interconnectivity of the boundary, the particle to shear cell size, and the flow condition in an annular shear cell. Prior to using these cells as rheometers, a thorough understanding of this interconnectivity needs to be developed.
4 citations
01 Jan 2007
TL;DR: In this article, the authors measured flowability of DDGS samples from five ethanol plants in the north central region of the U.S. using Carr and Jenike tests, and the resulting data was presented and discussed.
Abstract: Distillers dried grains with solubles (DDGS), a major coproduct from the corn-based fuel ethanol industry, is primarily used as livestock feed. Due to high protein, fiber, and energy contents, there is a high demand for DDGS. Flowability of DDGS is often hindered due the phenomenon of “caking”. Shipping and handling of DDGS has thus become a major issue due to bridge formation between the DDGS particles. The objective of this investigation was to measure flowability of DDGS samples from five ethanol plants in the north central region of the U.S. Carr and Jenike tests were performed, and the resulting data will be presented and discussed. Quantifying DDGS flowability is a first step toward overcoming this challenge facing the industry.
4 citations