Results 21 to 30 of about 2,116,123 (314)

A novel flow-based geometrical upscaling method for representing fault zones with two-phase fault rock properties into a dynamic reservoir model

open access: yesScientific Reports, 2021
Faults are generally represented in conventional upscaled models as 2D planar surfaces with transmissibility multipliers used to represent single-phase fault properties. However, faults are structurally complex 3D zones in which both single-phase and two-
Md Saiful Islam, Tom Manzocchi
doaj   +1 more source

POD-Galerkin Model for Incompressible Single-Phase Flow in Porous Media

open access: yesOpen Physics, 2016
Fast prediction modeling via proper orthogonal decomposition method combined with Galerkin projection is applied to incompressible single-phase fluid flow in porous media.
Wang Yi, Yu Bo, Sun Shuyu
doaj   +1 more source

Adaptive linear solution process for single-phase Darcy flow

open access: yesOil & Gas Science and Technology, 2020
This article presents an adaptive approach for solving linear systems arising from self-adjoint Partial Differential Equations (PDE) problems discretized by cell-centered finite volume method and stemming from single-phase flow simulations. This approach
Anciaux-Sedrakian Ani   +3 more
doaj   +1 more source

Single- and Two-Phase Flow Characterization Using Optical Fiber Bragg Gratings

open access: yesSensors, 2015
Single- and two-phase flow characterization using optical fiber Bragg gratings (FBGs) is presented. The sensor unit consists of the optical fiber Bragg grating positioned transversely to the flow and fixed in the pipe walls.
Virgínia H.V. Baroncini   +3 more
doaj   +1 more source

Entropy Production in Pipeline Flow of Dispersions of Water in Oil

open access: yesEntropy, 2014
Entropy production in pipeline adiabatic flow of water-in-oil emulsions is investigated experimentally in three different diameter pipes. The dispersed-phase (water droplets) concentration of emulsion is varied from 0 to 41% vol.
Rajinder Pal
doaj   +1 more source

A review of drag reduction by additives in curved pipes for single‐phase liquid and two‐phase flows

open access: yesEngineering Reports, 2021
The effect of drag‐reducing agents (DRAs) on fluid flows in straight pipes has been well documented. Key among these is the effect of DRAs on turbulence statistics (Reynolds shear stress, turbulence intensity, streamwise and wall‐normal velocity ...
Paul O. Ayegba   +3 more
doaj   +1 more source

Numerical simulation of single phase flow in a flotation machine

open access: yesComputer Assisted Methods in Engineering and Science, 2017
In the paper, the numerical model of the flow phenomena in the flotation machine is presented. The process of flotation consists of a number of phenomena which provide serious numerical difficulties.
Ireneusz Szczygieł   +5 more
doaj   +1 more source

Renal venous Doppler ultrasound – a new parameter for predicting outcomes in patients with decompensated heart failure

open access: yesБюллетень сибирской медицины, 2023
Aim. To assess the frequency, dynamics, and prognostic value of renal venous congestion using Doppler ultrasound in patients with decompensated heart failure (DHF).Materials and methods.
Zh. D. Kobalava   +3 more
doaj   +1 more source

A comparative numerical simulation study of single-phase flow and water-gas two-phase flow infiltration process in the vadose zone with the layered heterogeneous structure

open access: yesShuiwen dizhi gongcheng dizhi, 2022
The infiltration process in the vadose zone is affected by many factors. A quantitative study of the influence of the layered heterogeneous lithological structure and infiltration rate on the process of water infiltration in the vadose zone is helpful in
Jingxun GAO   +6 more
doaj   +1 more source

An equivalent single-phase flow for oil-water two-phase flow and its potential application in well test

open access: yes, 2018
In this work an equivalent single-phase flow model is proposed based on the oil-water two-phase flow equation with saturation-dependent parameters such as equivalent viscosity and equivalent formation volume factor. The equivalent viscosity is calculated
Wen-shu Zha   +3 more
semanticscholar   +1 more source

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