نتایج جستجو برای: coherent flow

تعداد نتایج: 537776  

A. Safarzadeh L. Esfandiary

In this paper, the performance of Reynolds Averaged Navier Stokes (RANS) simulations was evaluated to predict the flow structure developed by the presence of a sidewall obstruction in a uniform open-channel shallow flow. The study of these flow structures is important because they present in several real world configurations, such as groynes in rivers, where the erosion processes, mass transpor...

Journal: :Journal of Sound and Vibration 2021

This paper is concerned with the development of imaging methods to localize sources or reflectors in inhomogeneous moving media acoustic waves that have travelled through them. A typical example localization broadband a turbulent jet flow for aeroacoustic applications. The proposed algorithms are extensions Kirchhoff migration (KM) and coherent interferometry (CINT) which been considered smooth...

2005
Andrew T. Jessup Stephen G. Monismith Alexander R. Horner-Devine

LONG-TERM GOALS The long-term goals of this research are to combine state-of-the-art remote sensing and in situ measurements with advanced numerical modeling (a) to characterize coherent structures in river and estuarine flows and (b) to determine the extent to which their remotely sensed signatures can be used to initialize and guide predictive models. OBJECTIVES Coherent structures are genera...

2017
Rickard Englund Timo Ropinski Ingrid Hotz

Blood flow data from direct measurements (4D flow MRI) or numerical simulations opens new possibilities for the understanding of the development of cardiac diseases. However, before this new data can be used in clinical studies or for diagnosis, it is important to develop a notion of the characteristics of typical flow structures. To support this process we developed a novel blood flow clusteri...

Journal: :IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 2015

2009
Andrew Warkentin Robert Bauer

In this work, conventional (non-coherent), coherent-jet, and high pressure coolant delivery systems are compared for profile creep-feed grinding, under non-continuous dressing conditions. To facilitate this comparison, an analytical method of determining the available flow (coolant that hits the wheel or workpiece) was presented. The coolant delivery systems were compared for five different fee...

Present study examines turbulent structures of a rough bed open-channel flow in the context of deterministic approach. Instantaneous velocity field is measured in different hydraulic conditions using two dimensional Particle Image Velocimetry (PIV) in vertical plane and Stereoscopic PIV in horizontal plane. Different techniques and quantities such as swirl strength, two-point and cross-correlat...

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