Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"ergun"”.
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Gas distribution in shallow packed beds
… modelling approach. The starting point is the Ergun Equation which is used to determine the pressure drop over a bed where the flow is uni-directional. This equation has been applied in a vectorial form so it can be applied to maldistributed and multi-directional flows and has been realised in …
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Hydrodynamics of trickle bed reactors (TBRS) packed with industrial catalyst using advanced measurement techniques
… is quantitated properly by measured Ergun constants"--Abstract, page iv.
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Wave Mechanics in Constructed Oyster Reefs and the Design of Nature-Based Coastal Adaptation
… and accurately modeled with the modified Ergun Equations and the waves2Foam library of the open-source CFD software OpenFOAM. This research was then translated into a suite of interactive design activities, featuring a tabletop wave flume, scale models of coastal features, and a set of …
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Hydrodynamic and gasification behavior of coal and biomass fluidized beds and their mixtures
… the definition of the critical velocity in the Ergun correlation. The new modeling technique showed promising results for predicting fluidization behavior of fine particles. The fluidization behavior of three different mixtures of coal and poplar wood were studied. Although results indicated …
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Kinetics of dissolution of cuprite in phosphoric acid
Includes bibliographical references.
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New neighborhood search algorithms based on exponentially large neighborhoods
A practical approach for solving computationally intractable problems is to employ heuristic (approximation) algorithms that can find nearly optimal solutions within a reasonable amount of computational time. An improvement algorithm is an approximation algorithm which starts with a feasible …
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Performance characteristics of the left ventricle during and following induced extrasystoles
<p>During the last two decades, since the heart has become a direct target for various surgical procedures for the correction of several abnormalities, interest in understanding its basic regulatory mechanisms and performance has increased considerably. Many experiments have been devised to study …
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Modeling and Experimental Measurements of Laser-Sustained Hydrogen Plasmas
Laser propulsion is an advanced propulsion concept especially applicable to orbital transfer vehicles. As an alternative to combusting fuel and oxidizer, the concept utilizes a remote laser beam as a source of power. A laser sustained plasma (LSP) is the medium by which power is absorbed by the …
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Towards a comprehensive model for cooking processes
… the kinetic models together with the Ergun equation for the forced flow of the heated cooking liquor through the packed bed led to a simulation program of the spatial developments of delignification and carbohydrate degradation on reactor level.
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Sulfur coating of urea in shallow spouted beds
… and Littman (1980), and the vector form of the Ergun (1952) equation for gas motion in the annulus. The effect of atomizing air entering through the spray nozzle was successfully incorporated into the model by considering the total momentum flux into the bed. Conical beds were found to behave …
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MPM study of water wave interaction with porous seawalls
… forming the material, in accordance with the Ergun equation used to determine the body force between the solid and liquid phases. This equation is presented in Chapter 3. A larger mean grain size results in larger voids in the material, so that there is less resistance to flow and the …
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A Study on the Mechanical Characteristics of a Fiberglass Bed Formed During a Loss-of-Coolant-Accident at a PWR Nuclear Facility
Following a Loss-of-Coolant-Accident (LOCA) in one of the primary coolant lines in the containment building of a PWR Facility, it is possible that fiberglass pipe insulation could be dislodged and washed down to the sump pool. This fiberglass could collect into a bed' and cause blockage on the sump …