Viscous drag force effect on transportation of submicron particle contaminants during dry and steam laser cleaning

2005 ◽  
Author(s):  
Sergey I. Kudryashov ◽  
Susan D. Allen
Keyword(s):  
Drag Force ◽  
Laser Cleaning ◽  
Viscous Drag ◽  
Submicron Particle ◽  
Force Effect ◽  
Viscous Drag Force ◽  
Particle Contaminants

The numerical study of viscous drag force influence on low-frequency surge motion of a semi-submersible in storm sea states

2020 ◽  
Vol 213 ◽  
pp. 107511 ◽  
Author(s):  
Shan Ma ◽  
De-kang Xu ◽  
Wen-yang Duan ◽  
Ji-kang Chen ◽  
Kang-ping Liao ◽  
...  
Keyword(s):  
Drag Force ◽  
Numerical Study ◽  
Low Frequency ◽  
Viscous Drag ◽  
Viscous Drag Force

scholarly journals Исследование реакции поверхности жидкости на импульсное воздействие наклонной газовой струи при малых числах Рэйнольдса

2022 ◽  
Vol 92 (2) ◽  
pp. 216
Author(s):  
А.П. Савенков ◽  
В.А. Сычёв
Keyword(s):  
Drag Force ◽  
Liquid Surface ◽  
Dynamic Properties ◽  
Liquid System ◽  
Gas Jet ◽  
Viscous Drag ◽  
Phase System ◽  
Two Phase ◽  
Automatic Control Theory ◽  
Viscous Drag Force

A mathematical description of the motion of a cavity on the liquid surface under an oblique action of a gas jet is obtained using the well-known expressions for the movement of a gas bubble in a liquid. The boundary of the viscous drag force domination over the form drag force is determined. The impingement of the gas jet on the liquid surface is considered as a dynamic object of the automatic control theory. It is found that the dynamic properties of the two-phase system "gas jet - liquid" are described by the integrator equations. Using a specially designed setup, the transient response of the "gas jet - liquid" system were experimentally obtained for the aerodynamic action at angles of 20º and 50º to the surfaces of liquids with the viscosities of 0.71 and 26.1 Pa•s (Reynolds number Re < 2). The research results are necessary for the analysis of the non-contact aerodynamic method of liquid viscosity measurements.

The viscous drag force on a spherical bubble with a time-dependent radius

1998 ◽  
Vol 10 (3) ◽  
pp. 550-554 ◽  
Author(s):  
Jacques Magnaudet ◽  
Dominique Legendre
Keyword(s):  
Drag Force ◽  
Time Dependent ◽  
Viscous Drag ◽  
Spherical Bubble ◽  
Viscous Drag Force

Structures of a Magnetorheological Fluid

2001 ◽  
Vol 15 (06n07) ◽  
pp. 851-858 ◽  
Author(s):  
G. L. Gulley ◽  
R. Tao
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Drag Force ◽  
Liquid State ◽  
Magnetorheological Fluid ◽  
Viscous Drag ◽  
Viscous Drag Force ◽  
Brownian Force ◽  
Dynamics Simulations ◽  
Two Parameters

Molecular dynamics simulations were carried out to find the underlying structures of a Magnetorheological (MR) fluid while taking into account dipolar forces, viscous drag, and the Brownian force. Three different structures were found: the bct lattice, chains, and a liquid state. The conditions under which these structures are found is based on two parameters A and B which are the ratios of the dipolar force to the viscous drag force and the Brownian force to the dipolar force respectively.

Dark Matter: Could It Be Vacuum Viscosity?

2020 ◽  
Vol 13 (1) ◽  
pp. 47-57
Keyword(s):  
Dark Matter ◽  
Simple Model ◽  
Drag Force ◽  
Spiral Galaxies ◽  
Viscous Drag ◽  
Rotation Curves ◽  
The Galaxy ◽  
Viscous Drag Force ◽  
Matter Effect ◽  
Good Agreement

We test a hypothesis that stars located away from the center of the galaxy, moving under the effect of an emergent viscous drag force perpendicular to their velocities, might exhibit the behavior observed in the rotation curves of the spiral galaxies. We construct a simple model for such an assumption, then by using simple fitting technique, we are able to produce the rotation curves for a sample of 18 spiral galaxies. Results show good agreement with the observed rotation curves. The applicability of our hypothesis suggests that an emergent drag force perpendicular to the velocity of the stars might be the cause of the apparent dark matter effect.

Drag Force Effect of Surface Runoff on Stability of Shallow Soil Slope

2019 ◽  
Vol 56 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Fei Ye ◽  
Wenxi Fu ◽  
Xingyu Yuan ◽  
Yunlong Xiang
Keyword(s):  
Drag Force ◽  
Surface Runoff ◽  
Soil Slope ◽  
Force Effect ◽  
Shallow Soil ◽  
Effect Of Surface

Magnetic manipulation on the unlabeled nonmagnetic particles

2019 ◽  
Vol 33 (07) ◽  
pp. 1950047 ◽  
Author(s):  
Yongqing He ◽  
Laan Luo ◽  
Shuang Huang
Keyword(s):  
Flow Rate ◽  
Magnetic Force ◽  
Opposite Polarity ◽  
Viscous Drag ◽  
Maximum Deviation ◽  
Magnetic Manipulation ◽  
Practical Applications ◽  
Viscous Drag Force ◽  
Flow Rate Range ◽  
Nonmagnetic Particles

This paper reports two basic microfluidic strategies for the magnetic manipulation of unlabeled nonmagnetic particles/cells. One is the deflection induced by a single magnet, and the other is the confusing effect produced by two magnets of opposite polarity. They can be combined into more completed particle manipulations like continuous flow separation, counting and detection, which are essential steps in biomedical applications. We experimentally studied the dynamics of 10.4 and 20 [Formula: see text]m nonmagnetic polystyrene particles within a flow rate range of 30, 50, 70 and 90 [Formula: see text]L/min in a straight channel. We defined the cross-section length that the particles occupy as the “particle bandwidth” to characterize the extent of deflection and focusing. To predict the trajectories of the particles, we established a simple theoretical model by considering the magnetic force and viscous drag force. Compared with the experimental results, the maximum deviation of the simulation is 9.28%. The influences of magnetic nanoparticle concentration, magnetic field parameters, size of microparticles and flow rate are systematically investigated. We also demonstrated that the effective deflection and focusing could be realized at low Fe3O4 nanoparticle concentrations, which means that this method can reduce the damage on cells in the practical applications.

scholarly journals Dynamics of photo-ablated carbon plasma in an inert gas atmosphere

1998 ◽  
Vol 16 (1) ◽  
pp. 31-38 ◽  
Author(s):  
T. Kerdja ◽  
S. Abdelli ◽  
E. H. Amara ◽  
D. Ghobrini ◽  
M. Si-Bachir ◽  
...  
Keyword(s):  
Wave Model ◽  
Inert Atmosphere ◽  
Viscous Drag ◽  
Laser Evaporation ◽  
Force Model ◽  
Plasma Dynamics ◽  
Gas Atmosphere ◽  
Viscous Drag Force ◽  
Swan Band ◽  
Two Stages

Time and space-resolved emission spectroscopy measurements were performed to investigate plasma dynamics during laser evaporation of a graphite target in an ambient inert atmosphere. Intense molecular emission is found to occur behind a front separating the plasma from the foreign gas. Two stages of expansion are found and are well described, using a viscous drag force model for the first one and a delayed ideal blast wave model for the second. The vibrational temperature estimated using the Swan band in helium at different pressures is presented.

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