Auflistung Nach Schlagwort "Aspect ratio"
Anzeige der Dokumente 1-19 von 19
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2D nitrogen-doped hierarchically porous carbon: Key role of low dimensional structure in favoring electrocatalysis and mass transfer for oxygen reduction reaction
(2017)An ultrathin (thickness 1.0 nm) 2D nitrogen-doped hierarchically porous carbon (2DNHPC) film is developed by the nanocasting method; for comparison, a 3D nitrogen-doped ordered mesoporous carbon (3DNOMC) is also synthesized. ... -
A closed-form solution for the barrier properties of randomly oriented high aspect ratio flake composites
(2019)We derive closed-form solutions for the barrier factor of flake-filled composites, in which the flakes are randomly placed and oriented, with the orientation angles uniformly distributed in an interval [−ɛ, +ɛ], 0 < ɛ < ... -
Confinement of masonry columns with textile-reinforced mortar jackets
(2020)This paper presents an experimental investigation on the confinement of masonry columns with textile-reinforced mortar (TRM) jackets as a means of enhancing their axial load-carrying capacity and axial deformability. The ... -
The effect of shape and orientation on the barrier properties of flake-filled composites: A 3D approach
(2019)We carry out fully three-dimensional (3D) simulations in flake-filled composites with the objective of determining the effect of flake shape and orientation on their barrier properties. Our simulations are carried out in ... -
Estimation of the Poiseuille number in gas flows through rectangular nano- and micro-channels in the whole range of the Knudsen number
(2009)Based on a recent work (Valougeorgis, Phys. Fluis 19(9):091701.1-091701.4, 2007), the Poiseuille number for gas flows through channels of orthogonal cross sections is estimated in the whole range of the Knudsen number from ... -
An evaluation of models and computational approaches for the barrier properties of coatings containing flakes of high aspect ratio
(2019)We report on the results of a comprehensive two-dimensional computational study of diffusion across disordered flake composites. Our objective is (1) the evaluation of existing literature models for the effect of flake ... -
From flakes to ribbons: The barrier factor of composites containing flakes of rectangular shape
(2022)We present a comprehensive computational and theoretical analysis of diffusion through flake composites in which the flakes are of rectangular shape, spanning the entire spectrum from squares to ribbons. Following a large ... -
Gas flow and heat transfer simulation in MEMS via a mesoscopic approach
(2004)The flow problem of binary gaseous mixtures in rectangular micro channels due to small pressure, temperature and molar concentration gradients over the whole range of the Kn number is solved. The solution is based on a ... -
A general scaling for the barrier factor of composites containing thin layered flakes of rectangular, circular and hexagonal shape
(2020)We propose a general scaling which allows for the results of 3D mass transfer computations in layered flake composites containing square, circular or hexagonal flakes to collapse on a single master curve. We show that the ... -
MHD liquid metal flow and heat transfer between vertical coaxial cylinders under horizontal magnetic field
(2017)Direct numerical simulations are presented of MHD liquid metal flow and heat transfer in vertical annuli. Three annular gaps and four ratios of annular height to annular gap are considered. The walls of the external and ... -
A novel FastRSA algorithm: Statistical properties and evolution of microstructure
(2019)While the Random Sequential Adsorption (RSA) process for the generation of 2D geometries containing discrete entities has been extensively studied, both in terms of numerical simulations and in terms of its statistical ... -
A Novel Method for the Determination of the Lateral Dimensions of 2D Rectangular Flakes
(2022)We present a novel method for the determination of the lateral dimensions of thin rectangular flakes, as they exist randomly dispersed in flake composites. Knowledge of flake size and shape is essential for the correct ... -
Orientational randomness and its influence on the barrier properties of flake-filled composite films
(2017)This direct numerical study investigated the effect of orientational randomness on the barrier properties of flake-filled composites. Over 2500 simulations have been conducted in two-dimensional, doubly periodic unit cells, ... -
Pulsatile pressure driven rarefied gas flow in long rectangular ducts
(2018)The pulsatile pressure driven fully developed flow of a rarefied gas through an orthogonal duct is investigated, based on the time-dependent linear Bhatnagar, Gross, and Krook equation, by decomposing the flow into its ... -
A refined analytical model for earthquake-induced sloshing in half-full deformable horizontal cylindrical liquid containers
(2016)The coupled response of elastic deformable liquid containers of horizontal-cylindrical shape under external seismic excitation is examined, through an analytical methodology, assuming inviscid-incompressible fluid and ... -
Response of RC Frames Strengthened by RC Infill Walls: Experimental Study
(2019)The experimental results of a research program on the response of 1/3-scale reinforced concrete infilled frames are presented and evaluated. The main objective was to assess the seismic performance of RC frames infilled ... -
A simple and efficient model for seismic response and low-cycle fatigue assessment of uplifting liquid storage tanks
(2018)Ground-supported unanchored liquid-storage cylindrical tanks, when subjected to strong seismic loading may exhibit uplifting of their bottom plate, which may have significant effects on their dynamic behavior and structural ... -
Simplified model for the seismic performance of unanchored liquid storage tanks
(2015)Ground-supported unanchored liquid-storage cylindrical tanks, when subjected to strong seismic loading may exhibit uplifting of their bottom plate, which has significant effects on their dynamic behavior and strength. Those ... -
Validity range of linear kinetic modeling in rarefied pressure driven single gas flows through circular capillaries
(2017)The range of validity of various linear kinetic modeling approaches simulating rarefied pressure driven gas flow through circular tubes is computationally investigated by comparing the flowrates obtained by the linear ...