Results 21 to 30 of about 410,014 (263)

From shear stress to wall pressure spectra: a semi-analytical approach to account for mean pressure gradients in turbulent boundary layers

open access: yesActa Acustica, 2022
This study offers a semi-analytical means to compute the wall pressure spectra beneath a turbulent boundary layer depending only on the latter’s Kármán number and dimensionless pressure gradient.
Prigent Simon L., Bailly Christophe
doaj   +1 more source

The Pressure Gradient System [PDF]

open access: yesMethods and Applications of Analysis, 2010
The pressure gradient system is a sub-system of the compressible Euler system. It can be obtained either through a flux splitting or an asymptotic expansion. In both derivations, the velocity field is treated as a small remnant of the original velocity of the Euler system.
Zheng , Yuxi, Robinson, Zachary
openaire   +2 more sources

Advances of Surface Wind Speed Changes over China Under Global Warming

open access: yes应用气象学报, 2020
Previous studies indicate that surface wind speed (SWS) over China is declining continuously during past decades under global warming, and this has significant impact on wind energy resources.
Ding Yihui, Li Xiao, Li Qiaoping
doaj   +1 more source

Sutureless vs. rapid-deployment valve: a systemic review and meta-analysis for a direct comparison of intraoperative performance and clinical outcomes

open access: yesFrontiers in Cardiovascular Medicine, 2023
BackgroundSutureless and rapid-deployment valves are bioprostheses anchoring within the aortic annulus with few sutures, and they act as a hybrid of conventional surgical and transcatheter valves under aortic valve replacement.
Chenhao Wang   +13 more
doaj   +1 more source

MODELING OF PPG SWELLING AND SHRINKAGE

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2016
The aim of the work described was to develop a method for selection of a gel. This work involves studying the gel PPG swelling and shrinkage processes.
S. K. Sokhoshko, G. H. Ali
doaj   +1 more source

THEORETICAL MODEL FOR CALCULATION OF THE EFFECTIVE SHEAR VISCOSITY OF A PSEUDO-PLASTIC MATERIAL IN A FRACTURE

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2016
The ultimate goal of this work was to develop a method which can be used in mature oil fields to determine the effective viscosity of the granulated gel (PPG) used for plugging the anthropogenic fractures (after FHF).
S. V. Ovchinnikova, G. H. Ali
doaj   +1 more source

Evolution Characteristics of Separated Vortices and Near-Wall Flow in a Centrifugal Impeller in an Off-Designed Condition

open access: yesApplied Sciences, 2020
Flow separation is undesirable and lowers the efficiency of centrifugal impellers. In this study, the evolution characteristics of separated vortices in a centrifugal impeller are studied under the off-designed flow rate condition.
Shihao Zhou   +3 more
doaj   +1 more source

Examination of Couette Flow with a Pressure Gradient and Heat Conduction Using Molecular Dynamics Simulation

open access: yesApplied Sciences
As computer capabilities improve, Molecular Dynamics simulations are becoming more important for solving various flow problems. In this study, Couette and Poiseuille flows at different wall temperatures were investigated using a hard-sphere Molecular ...
Esma Pala Öngül, İlyas Kandemir
doaj   +1 more source

MHD flow of non-Newtonian ferro nanofluid between two vertical porous walls with Cattaneo–Christov heat flux, entropy generation, and time-dependent pressure gradient

open access: yesNonlinear Analysis, 2023
This article studies the magnetohydrodynamic flow of non-Newtonian ferro nanofluid subject to time-dependent pressure gradient between two vertical permeable walls with Cattaneo–Christov heat flux and entropy generation.
Anala Subramanyam Reddy   +4 more
doaj   +1 more source

Guidelines for Pediatric Radiotherapy Simulation: A Report From the Children's Oncology Group Radiation Oncology Discipline

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric radiation therapy presents unique challenges compared to adult treatments, including those of immobilization, potential need for sedation, and the critical importance of accurate, reproducible positioning. Additionally, heightened attention to imaging doses is necessary to minimize long‐term toxicity in survivors.
Parham Alaei   +17 more
wiley   +1 more source

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