College of Engineering: المرسلات الحديثة
السجلات المعروضة 2161 -- 2180 من 8781
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Effects of Fine-Grained Particles' Migration and Clogging in Porous Media on Gas Production from Hydrate-Bearing Sediments
( Hindawi Limited , 2019 , Article)The migration of fine particles in porous media has been studied for different applications, including gas production from hydrate-bearing sediments. The clogging behavior of fine particles is affected by fine particle-pore ... -
Impact of fines type on gas flow using 3D micro-computed tomography
( Society of Petroleum Engineers , 2019 , Conference)Methane hydrates are promising unconventional energy source with natural reserves above 1,000 Trillion m3. Hydrates are found in saturated sandy sediments, where multi-phase flow of gas takes place through sediment's pores, ... -
Hydrate surface area measurements during dissociation using dynamic 3d synchrotron computed tomography
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)Availability of natural hydrates and ongoing rise in demand for energy, motivated researchers to consider hydrates as a potential energy source. Prior to gas production operations from hydrate-bearing sediments, hydrate ... -
Pore networks to characterize formation damage due to fines at varied confinement and sand shape
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)Carbon sequestration in geological formations is in demand for many applications, especially energy production from hydrates. During gas production in a sandy hydrate reservoir, two phase flow and changes in confinement ... -
Grouping minimum REV of porosity and tortuosity based on descriptors of sand grains
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)In sandy reservoirs, selecting a representative elementary volume (REV) for the pore scale, is essential for predictive upscaling toward the reservoir scale. The porosity and tortuosity of a sand media are used for REV ... -
Pore-scale mechanisms associated with permeability impairment in porous media: A micromodel study
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)Recently, researchers are attracted towards the gas production from hydrate bearing sediments considering its abundance in marine continental margins and persisting demand for alternate energy. Dissociation of hydrate into ... -
Biological anodic oxidation and cathodic reduction reactions for improved bioelectrochemical treatment of petroleum refinery wastewater
( Elsevier , 2018 , Article)Bioelectrochemical systems (BESs) were evaluated for the bioelectrochemical treatment (BET) of petroleum refinery wastewater (PRW) by applying mild electrochemical potential in the range of 400-1000 mV on a single chamber ... -
Enhanced treatment of petroleum refinery wastewater by short-term applied voltage in single chamber microbial fuel cell
( Elsevier , 2018 , Article)Electrochemically active anodic biofilm that has adapted under mild applied potentials in the range 100-500 mV was evaluated for its improved bioelectrogenesis and bioelectrochemical treatment of petroleum refinery wastewater ... -
Quantifying morphology of sands using 3D imaging
( American Society of Civil Engineers (ASCE) , 2015 , Article)Particle morphology plays a significant role in influencing engineering behavior of granular materials. Surface texture, roundness, and sphericity represent distinct multiscale measures needed to fully describe particle ... -
Numerical study on the damping characteristics of a shock absorber valve utilizing different velocities through CFD analysis
( National Technical University of Athens , 2021 , Conference)Shock absorbers or hydraulic dampers are power dissipating devices. The fluid flow inside the damper is governed by predefined passages. The damping effect is accomplished by the resistance of oil to flow through the ... -
Energy harvesting from railway vibrations - A numerical study based on beam-on-elastic-foundation under quasi-static loading
( National Technical University of Athens , 2021 , Conference)The objective of this paper is to investigate energy harvesting of train-induced rail vibrations and to provide a comparison between various feasible harvesting locations based on the expected electrical power output. ... -
Accounting for the influence of the free surface on the vibration response of underground railway tunnels: A new iterative method
( KU Leuven - Departement Werktuigkunde , 2020 , Conference)This paper presents a new method for calculating the ground-borne vibration from shallow underground railways. The method is based on an iterative wave-scattering approach, which decouples the problem into two sub-systems: ... -
The fictitious force method for efficient calculation of vibration from a tunnel embedded in a multi-layered half-space
( Elsevier , 2014 , Article)This paper presents an extension of the Pipe-in-Pipe (PiP) model for calculating vibrations from underground railways that allows for the incorporation of a multi-layered half-space geometry. The model is based on the ... -
A mixed space-time and wavenumber domain model for predicting ground vibration from railway tracks
( National Technical University of Athens , 2015 , Conference)In this paper, a mixed model for studying ground vibration generated from surface railway tracks is presented. A ballasted track with nonlinear resilient components is modelled in the time domain using the Finite Element ... -
The PiP model and progress in ground vibration from railways
( Australian Acoustical Society , 2017 , Conference)Vibration in the ground causes problems. At large amplitude vibration causes damage, the most obvious example being earthquake damage. But the ground motion in a damaging earthquake is typically low-frequency (below 1Hz) ... -
Experimental validation of a numerical model for the ground vibration from trains in tunnels
( DC/ConfOrg , 2015 , Conference)Ground vibration and ground-borne noise from trains in tunnels are attracting increasing attention from researchers and engineers. They are important environmental issues related with the operation of underground networks ... -
Effect of rail unevenness correlation on the prediction of ground-borne vibration from railways
( DC/ConfOrg , 2015 , Conference)This paper presents the influence of rail unevenness correlation on the predicted track and ground vibration. The study is based on an integrated railway model in the wavenumber-frequency domain with varying complexity ... -
Modelling the dynamic pile-soil-pile interaction in a multi-layered half-space
( DC/ConfOrg , 2015 , Conference)Within the context of railway ground-borne vibration, the dynamic pile-soil-pile interaction remains an area that has not been sufficiently investigated. Whilst a number of researchers have scrutinised the vibration response ... -
A comprehensive review of power flow controllers in interconnected power system networks
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article Review)Energy security is one of the most crucial factor in the development of any nation. Interconnections among different power system networks are made to lower the overall price of power generation as well as enhance the ... -
A Novel Modified Switched Inductor Boost Converter with Reduced Switch Voltage Stress
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)Recently, switched inductor (SI) and switched capacitor techniques in dc-dc converter are recommended to achieve high voltage by using the principle of parallel charging and series discharging of reactive elements. It is ...
