نتایج جستجو برای: unsteady state displacement experiments

تعداد نتایج: 1347154  

2007
Walter A. Silva

Recent enhancements to the development of CFD-based unsteady aerodynamic and aeroelastic reduced-order models (ROMs) are presented. These enhancements include the simultaneous application of structural modes as CFD input, static aeroelastic analysis using a ROM, and matched-point solutions using a ROM. The simultaneous application of structural modes as CFD input enables the computation of the ...

2008
Flint O. Thomas Alexey Kozlov Thomas C. Corke

In this paper, the results of flow-control experiments using single dielectric barrier discharge plasma actuators to controlflow separation andunsteady vortex shedding froma circular cylinder in crossfloware reported. Thiswork is motivated by the need to reduce landing gear noise for commercial transport aircraft via an effective streamlining created by the actuators. The experiments are perfor...

2006
S. SUBBEY H. MONFARED M. CHRISTIE M. SAMBRIDGE

Unsteady-state (USS) core flood experiments provide data for deriving twophase relative permeability and capillary pressure functions. The experimental data is uncertain due to measurement errors, and the accuracy of the derived flow functions is limited by both data and modeling errors. History matching provides a reasonable means of deriving in-phase flow functions from uncertain unsteady-sta...

2004
Roslinda Nazar Norsarahaida Amin Diana Filip Ioan Pop

Unsteady two-dimensional stagnation point flow of an incompressible viscous fluid over a flat deformable sheet is studied when the flow is started impulsively from rest and the sheet is suddenly stretched in its own plane with a velocity proportional to the distance from the stagnation point. After a similarity transformation, the unsteady boundary layer equation is solved numerically using the...

Simulation of a process and analysis of its resulting data in both dynamic and steady-state conditions are fundamental steps in understanding the process in order to design and efficient control of system as well as implementing operational cost reduction scheme. In the present paper, steady and unsteady state simulation of Amir Kabir1, 3 butadiene purification units has been done by using Aspe...

ژورنال: علوم آب و خاک 2017
اسدی, حسین, علی‌گلی کلرود, محمد, گرجی, منوچهر,

This study aimed to investigate the dynamic changes of rill erosion and evaluate the ability of Hairsine-Rose model in estimation of sediment concentration. The experiments were carried out at the Soil and Water Conservation Research Station of Tehran University in Kuhin, Qazvin. Four flow rates were tested at three slopes in trapezoidal hand-made rills of 3 m long and 5 cm base width. Outflows...

Journal: :International Journal of Micro Air Vehicles 2009

Journal: :journal of the iranian chemical research 0
yacine benguerba laboratoire de génie des procédés chimiques, université ferhat abbas sétif, 19000, sétif, algérie brahim djellouli laboratoire de génie des procédés chimiques, université ferhat abbas sétif, 19000, sétif, algérie lemnouer chibane laboratoire de génie des procédés chimiques, université ferhat abbas sétif, 19000, sétif, algérie lahcene bencheikh laboratoire de génie des procédés chimiques, université ferhat abbas sétif, 19000, sétif, algérie

the determination of the optimal distribution of the catalytic activity profile, whichmaximizes the catalytic effectiveness, in created unsteady state conditions, is analyzed andtreated numerically for the case of a simple reaction. it was proven that the modulation, of thetemperature and the reactant concentration of the external bulk fluid, leads to a considerableincrease of the catalytic eff...

2014
Yazid Bindar

In this study, the homogeneity of the continuum model of a fixed bed reactor operated in steady state and unsteady state systems for lean CH4 oxidation is investigated. The steady-state fixed bed reactor system was operated under once-through direction, while the unsteady-state fixed bed reactor system was operated under flow reversal. The governing equations consisting of mass and energy balan...

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