Flow simulation through porous ceramics used as a throttle in an implantable infusion pump

Schmitz, André; Mutlu, Y. S.; Glatt, Erik; Klein, Stephan; Nestler, B.

doi:10.1515/bmt-2012-4408

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…30 For the simulation of flow properties, the effective permeability was to be simulated by numerically solving incompressible creeping Newtonian flow based on solving Stokes equations. 31 The simulations were carried out for a fluid with the physical properties of air at a temperature of 20 °C, and the values of density and of dynamic viscosity were 1.204 kg/m 3 and 1.834 × 10 −5 kg/(m•s), respectively. Pressure drop was set to 0.02 Pa along Z-direction.…”

Section: ■ Simulation Methodsmentioning

confidence: 99%

Structure-Dependent Analysis of Nanoporous Metals: Clues from Mechanical, Conduction, and Flow Properties

et al. 2018

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Nanoporous metals have emerged as promising electrocatalysts for electrochemical systems. The rational design needs us to understand the structure−property relations of such bicontinuous porous structures in detail. In this study, we investigate the effect of microstructures on effective macro-properties of three types of nanoporous architectures, namely dealloying structure, Voronoi structure, and diamond structure. These structures have similar values of nodal connectivity and relative density. Finite volume simulations are carried out to predict the effective mechanical, conduction and flow properties. Quantitative structural analysis reveals that the dealloying and Voronoi structures are distinct in terms of ligament curliness, whereas the diamond structure is a long-range order topology. The results suggest that the specific surface area, Young's modulus, yield strength, conductivity, and permeability are highly sensitive to the curliness factor, while being relatively much less sensitive to the distributions of pore size and ligament diameter. The present study provides not only new insights into the structure−property relations of nanoporous metals but also a practical guide for their practical application.

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Section: ■ Simulation Methodsmentioning

confidence: 99%

Structure-Dependent Analysis of Nanoporous Metals: Clues from Mechanical, Conduction, and Flow Properties

et al. 2018

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Simulation of Drying for Multilayer Membranes

2014

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In ceramic membrane preparation, drying variables and its phenomena are very important to ensure no defects and failures in membrane layers. Generally, ceramic membrane consists of several layer with the top structure or layers possesses a very hygroscopic zone that acting as a separator while next two layers are non hygroscopic zone. Combination of these two different multilayer systems that exhibit different properties always associated to the failure of ceramic consolidation structure during the drying and sintering process. Therefore,controlling of drying behavior is very important to ensure a consistent shrinkage exist between these two layers system. Thus in this present work, the drying process of multilayer materials was studied and observed via simulation technique. A two dimensional mathematical model that coupled mass, heat and gas transfer was employed. Finite element method was used to solve the model and numerically compute using Skyline solver to capture highly nonlinear and transient process. The results showed that drying of multilayer material for membrane structure is obviously different from drying of single layer system. Separation zone that acting as hygroscopic zone does play its roles towards effecting higher pore water pressure and gas pressure. Thus, different drying factors can be seen in the layering system. Hence, understanding those drying factors that may cause inhomogeneous shrinkage due to the existence of different porous network in membrane layers is essential to avoid ceramic membrane failure.

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Flow simulation through porous ceramics used as a throttle in an implantable infusion pump

Cited by 2 publications

References 6 publications

Structure-Dependent Analysis of Nanoporous Metals: Clues from Mechanical, Conduction, and Flow Properties

Structure-Dependent Analysis of Nanoporous Metals: Clues from Mechanical, Conduction, and Flow Properties

Simulation of Drying for Multilayer Membranes

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