Faculty Opinions recommendation of Intracardiac fluid forces are an essential epigenetic factor for embryonic cardiogenesis.

In centrifugal pumps for artificial hearts, a magnetic drive with lightly loaded journal bearing system is often used. In such a system, the rigidity of the bearing is small and the impeller usually rotates over the critical speed. In such cases, the rotordynamic fluid forces play an important role for shaft vibration. In the present study, the characteristics of the rotordynamic fluid forces on the impeller were examined. The rotordynamic fluid forces were measured in the cases with/without the whirling motion. It was found that the rotordynamic forces become destabilizing in a wide range of positive whirl. The effect of leakage flow was also examined.

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The Dynamics of Towed Arrays

Journal of Offshore Mechanics and Arctic Engineering ◽

10.1115/1.3257149 ◽

1989 ◽

Vol 111 (3) ◽

pp. 208-213 ◽

Cited By ~ 15

Author(s):

G. S. Triantafyllou ◽

C. Chryssostomidis

Keyword(s):

Iterative Procedure ◽

Cross Flow ◽

Low Frequency ◽

Harmonic Excitation ◽

Fluid Forces ◽

Damped System ◽

Equivalent Linear ◽

Quadratic Drag ◽

Linear Damping ◽

Towed Arrays

A procedure for calculating the response of an array to a harmonic excitation applied at the upstream end is presented. The fluid forces on the array are modeled following the slender-body approximation and the cross-flow principle. An equivalent linear damping is used to replace the quadratic drag due to cross-flow separation. The equivalent linear damping is determined using an iterative procedure. Numerical and asymptotic solutions are derived, and the response of a typical long array is calculated. It is found that, when the separation drag is included, the array exhibits the behavior of an over-damped system, responding only to low-frequency excitations.

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Proteomics Analysis of Human Obesity Reveals the Epigenetic Factor HDAC4 as a Potential Target for Obesity

PLoS ONE ◽

10.1371/journal.pone.0075342 ◽

2013 ◽

Vol 8 (9) ◽

pp. e75342 ◽

Cited By ~ 52

Author(s):

Mohamed Abu-Farha ◽

Ali Tiss ◽

Jehad Abubaker ◽

Abdelkrim Khadir ◽

Fahad Al-Ghimlas ◽

...

Keyword(s):

Human Obesity ◽

Proteomics Analysis ◽

Potential Target ◽

Epigenetic Factor

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Theoretical study of fluid forces on a centrifugal impeller rotating and whirling in a volute.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.52.3159 ◽

1986 ◽

Vol 52 (481) ◽

pp. 3159-3165 ◽

Cited By ~ 3

Author(s):

Yoshinobu TSUJIMOTO ◽

Allan.J. ACOSTA ◽

Christopher.E. BRENNEN

Keyword(s):

Theoretical Study ◽

Centrifugal Impeller ◽

Fluid Forces

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A Double Birkhoff Wake Oscillator for the Modeling of Vortex-Induced Vibration

Volume 7: CFD and VIV; Offshore Geotechnics ◽

10.1115/omae2011-49435 ◽

2011 ◽

Author(s):

R. H. M. Ogink

Keyword(s):

Free Vibration ◽

Added Mass ◽

Mass Force ◽

Near Wake ◽

Vibration Measurements ◽

Vortex Induced Vibration ◽

Fluid Forces ◽

Wake Oscillator ◽

Model Equations ◽

Far Wake

A double Birkhoff wake oscillator for the modeling of vortex-induced vibration is presented in which the oscillating variables are assumed to be associated with the boundary layer/near wake and the far wake. The fluid forces are assumed to consist of a potential added mass force and a force due to vortex shedding. In the limit of vanishing incoming flow velocity, the model equations reduce to a form similar to the Morison equation. The results of the double wake oscillator have been compared with forced vibration measurements and free vibration measurements over a range of mass and damping ratios. The model is capable of describing the most important trends in both the forced and free vibration experiments. Specifically, the double wake oscillator is able to model both the upper and lower branch of free vibration.

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