Search Results - "Pokrajac, Dubravka"

Numerical study of the effects of contact angle and viscosity ratio on the dynamics of snap-off through porous media by Starnoni, Michele, Pokrajac, Dubravka

“…•Numerical simulations of snap-off through porous media are presented.•The effects of contact angle and viscosity ratio are examined.•Pore-throat constrictions…”
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Double-Averaging Concept for Rough-Bed Open-Channel and Overland Flows: Theoretical Background by Nikora, Vladimir, McEwan, Ian, McLean, Stephen, Coleman, Stephen, Pokrajac, Dubravka, Walters, Roy

“…The goal of this paper is to discuss the spatial averaging concept in environmental hydraulics and develop it further by considering transport equations for…”
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Velocity Measurements of a Free-Surface Turbulent Flow Penetrating a Porous Medium Composed of Uniform-Size Spheres by Pokrajac, Dubravka, Manes, Costantino

“…We present a laboratory experimental investigation of the interaction between the turbulent flow in an open channel and the turbulent flow within its very…”
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Double-Averaging Concept for Rough-Bed Open-Channel and Overland Flows: Applications by Nikora, Vladimir, McLean, Stephen, Coleman, Stephen, Pokrajac, Dubravka, McEwan, Ian, Campbell, Lorna, Aberle, Jochen, Clunie, Dougal, Koll, Katinka

“…The paper briefly outlines the double-averaging methodology for studying environmental rough-bed flows. It focuses on the applications of this methodology in…”
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Spatially averaged turbulent stress and its partitioning by Pokrajac, Dubravka, McEwan, Ian, Nikora, Vladimir

“…Double averaging of the fundamental flow equations is an attractive methodology for investigating spatially heterogeneous flows. The resulting double-averaged…”
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General shallow water equations (GSWEs) by Pokrajac, Dubravka

“…Shallow water equations (SWEs) have been traditionally derived by integrating fundamental flow equations over a flow profile above a single point in a…”
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Bed-Load Effects on Hydrodynamics of Rough-Bed Open-Channel Flows by Campbell, Lorna, McEwan, Ian, Nikora, Vladimir, Pokrajac, Dubravka, Gallagher, Michael, Manes, Costantino

“…The extent to which turbulent structure is affected by bed-load transport is investigated experimentally using a nonporous fixed planar bed comprising…”
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Cleat structure analysis and permeability simulation of coal samples based on micro-computed tomography (micro-CT) and scan electron microscopy (SEM) technology by Roslin, Alexandra, Pokrajac, Dubravka, Zhou, Yingfang

“…Coal has been playing an important role as a valuable source of energy for many years. In turn, gas production from coal reservoirs is a modern development and…”
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Automated extraction of in situ contact angles from micro-computed tomography images of porous media by Ibekwe, Anelechi, Pokrajac, Dubravka, Tanino, Yukie

“…We present a simple and robust algorithm for the automated measurement of in situ contact angles from segmented micro-computed tomography images of immiscible…”
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3D pore system reconstruction using nano-scale 2D SEM images and pore size distribution analysis for intermediate rank coal matrix by Roslin, Alexandra, Pokrajac, Dubravka, Wu, Kejian, Zhou, Yingfang

“…This paper comprises the analysis of scanning electron microscopy (SEM) images, nuclear magnetic resonance (NMR) and mercury injection capillary pressure…”
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Permeability Upscaling Using the Cubic Law Based on the Analysis of Multiresolution Micro Computed Tomography Images of Intermediate Rank Coal by Roslin, Alexandra, Pokrajac, Dubravka, Zhou, Yingfang

“…This paper presents a method for upscaling permeability of fractured coal using the cubic law to quantify permeability of the fracture system. The version of…”
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Coal Matrix Pore Analysis Using Nanoscale Scanning Electron Microscopy and Direct Capillary Pressure Curve Simulation by Roslin, Alexandra, Pokrajac, Dubravka, Zhou, Yingfang

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Depth-integrated Reynolds-averaged Navier-Stokes equations for shallow flows over rough permeable beds by Pokrajac, Dubravka

“…Depth-integrated Reynolds-averaged Navier-Stokes (DIRANS) equations for free surface flows over permeable rough beds are rigorously derived in order to clarify…”
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Investigation of nonlinear wave-induced seabed response around mono-pile foundation by Lin, Zaibin, Pokrajac, Dubravka, Guo, Yakun, Jeng, Dong-sheng, Tang, Tian, Rey, Nick, Zheng, Jinhai, Zhang, Jisheng

“…Stability and safety of offshore wind turbines with mono-pile foundations, affected by nonlinear wave effect and dynamic seabed response, are the primary…”
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A Low-Cost, Non-hazardous Protocol for Surface Texturing of Glass Particles by Ibekwe, Anelechi, Tanino, Yukie, Pokrajac, Dubravka

“…We present a cheap, efficient, and non-hazardous protocol for altering the roughness of hard particles at the nanometer-scale using a stone tumbler, a tool…”
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Near-trapping effect of wave-cylinders interaction on pore water pressure and liquefaction around a cylinder array by Lin, Zaibin, Pokrajac, Dubravka, Guo, Yakun, Liao, Chencong, Tang, Tian

“…The near-trapping effects on wave-induced dynamic seabed response and liquefaction close to a multi-cylinder foundation in storm wave conditions are examined…”
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Spatially Averaged Flows over Mobile Rough Beds: Definitions, Averaging Theorems, and Conservation Equations by Nikora, Vladimir, Ballio, Francesco, Coleman, Stephen, Pokrajac, Dubravka

“…AbstractThis paper reports the double-averaged (in space and in time) hydrodynamic equations for mobile-boundary conditions that are derived based on the…”
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Exploring tissue permeability of brain tumours in different grades: Insights from pore-scale fluid dynamics analysis by Yang, Yi, Yuan, Tian, Panaitescu, Ciprian, Li, Rui, Wu, Kejian, Zhou, Yingfang, Pokrajac, Dubravka, Dini, Daniele, Zhan, Wenbo

“…Interstitial fluid (ISF) flow is identified as an essential physiological process that plays an important role in the development and progression of brain…”
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Fluorescence spectroscopy of Rhodamine 6G: Concentration and solvent effects by Zehentbauer, Florian M., Moretto, Claudia, Stephen, Ryan, Thevar, Thangavel, Gilchrist, John R., Pokrajac, Dubravka, Richard, Katherine L., Kiefer, Johannes

“…[Display omitted] •Both concentration and solvent effects can be utilized for tuning the optical emission of Rhodamine 6G.•Rhodamine 6G fluorescence in aqueous…”
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Influence of air chambers on wavefront steepening in railway tunnels by Liu, Feng, Vardy, Alan E., Pokrajac, Dubravka

“…•Multiple air chambers can greatly reduce wavefront steepnesses in tunnels.•Suitable chambers can prevent unacceptable pressure radiation from tunnels.•The…”
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