Topic
Added mass
About: Added mass is a research topic. Over the lifetime, 2849 publications have been published within this topic receiving 47899 citations.
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TL;DR: In this article, an analysis of the extensive literature on non-steady drag forces supports the correlation of the data by means of a total drag coefficient, which appears to be a function of the Reynolds Number and of a reduced time parameter which is related to the number of particle diameters traversed since the initiation of the motion.
Abstract: An analysis of the extensive literature on non-steady drag forces supports the correlation of the data by means of a total drag coefficient, which appears to be a function of the Reynolds Number and of a reduced time parameter which is related to the number of particle diameters traversed since the initiation of the motion. The added mass concept is shown to be both completely inadequate and theoretically unsound. An increase in wake turbulence resulting from Reynolds Number increases or from the occurrence of surface roughness seems to diminish the acceleration effects.
Fundamental studies of the flow fields around blunt bodies reveal the extreme complexity of the phenomena occurring during acceleration. Explanations offered for the characteristics of the non-steady drag coefficient behavior re shown to be frequently at variances with these findings.
70 citations
TL;DR: In this article, a dimensionless damping parameter, c ⁎ = 2 c ω / ρ U 2, is defined for cylinders experiencing flow-induced vibration, which overcomes the limitations of "mass-damping" parameters, which first came into use in 1955.
69 citations
TL;DR: In this article, the fundamental impulsive modes of vibration of cylindrical tank-liquid systems anchored to the foundation under horizontal motion were investigated using a general purpose finite element (FE) program, and the influence of the hydrostatic pressure and the self-weight on the natural periods and modes was considered.
69 citations
TL;DR: In this paper, the uniform motion of a mass along an axially compressed Euler-Bernoulli beam on a viscoelastic foundation is investigated and it is shown that the instability starts at lower velocities as the compressional force increases.
69 citations
TL;DR: In this article, the authors derived the calibration constants necessary for using single-walled carbon nanotubes (CNTs) as nanoscale mass sensors, where the CNT resonators are assumed to be either in cantilevered or bridged configurations.
Abstract: We derive the calibration constants necessary for using single-walled carbon nanotubes (CNTs) as nanoscale mass sensors. The CNT resonators are assumed to be either in cantilevered or in bridged configurations. Two cases, namely, when the added mass can be considered as a point mass and when the added mass is distributed over a larger area is considered. Closed-form transcendental equations have been derived for the frequency shift due to the added mass. Using the energy principles, generalized nondimensional calibration constants have been derived for an explicit relationship between the added mass and the frequency shift. A molecular mechanics model based on the universal force field potential is used to validate the new results presented. The results indicate that the distributed nature of the mass to be detected has considerable effect on the performance of the sensor.
69 citations