Modelling of local admixture stratification in in disperse flows with kinematic singularities

2007 ◽  
Vol 5 ◽  
pp. 254-260
Author(s):  
N.A. Lebedeva
Keyword(s):  
Unsteady Flow ◽  
Stagnation Point ◽  
Rigid Wall ◽  
Dispersed Phase ◽  
Gas Flows ◽  
Dusty Gas ◽  
Dispersed Flow ◽  
Wall Flows ◽  
Kinematic Singularities

Development of mesoscale non-uniformities of the dispersed phase in dusty-gas flows with kinematic singularities is considered. As examples, the following flows with dispersed admixture are studied: a flow near a stagnation point of two colliding viscous streams, gas-dispersed flow near a rigid wall, flows with localized vorticity, an unsteady flow in a neighborhood of a zero acceleration point.

Modeling of dusty gas flows due to plume impingement on a lunar surface

2021 ◽  
Vol 33 (5) ◽  
pp. 053307
Author(s):  
Arun K. Chinnappan ◽  
Rakesh Kumar ◽  
Vaibhav K. Arghode
Keyword(s):  
Lunar Surface ◽  
Gas Flows ◽  
Dusty Gas

Flow‐orientation effect in batch‐produced Langmuir–Blodgett films: Observation of the unsteady flow around the stagnation point

1991 ◽  
Vol 70 (3) ◽  
pp. 1425-1432 ◽  
Author(s):  
Yuka Tabe ◽  
Keiichi Ikegami ◽  
Shin‐ichi Kuroda ◽  
Kazuhiro Saito ◽  
Mitsuyoshi Saito ◽  
...  
Keyword(s):  
Unsteady Flow ◽  
Stagnation Point ◽  
Orientation Effect ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

scholarly journals Building Planets with Dusty Gas

2004 ◽  
Vol 213 ◽  
pp. 231-234
Author(s):  
S. T. Maddison ◽  
R. J. Humble ◽  
J. R. Murray
Keyword(s):  
Solar Nebula ◽  
Numerical Technique ◽  
Dynamical Evolution ◽  
Gas Flows ◽  
Dusty Gas ◽  
Dust Distribution ◽  
Self Gravity ◽  
Gas Medium

We have developed a new numerical technique for simulating dusty-gas flows. Our code incorporates gas hydrodynamics, self-gravity and dust drag to follow the dynamical evolution of a dusty-gas medium. We have incorporated several descriptions for the drag between gas and dust phases and can model flows with submillimetre, centimetre and metre size “dust”. We present calculations run on the APAC1 supercomputer following the evolution of the dust distribution in the pre-solar nebula.

scholarly journals Supersonic dusty-gas flows with Knudsen effect in interphase momentum exchange

2004 ◽  
Vol 20 (5) ◽  
pp. 465-470
Author(s):  
Wang Boyi ◽  
A. N. Osiptsov ◽  
L. A. Egorova ◽  
V. I. Sakharov
Keyword(s):  
Gas Flows ◽  
Dusty Gas ◽  
Momentum Exchange ◽  
Knudsen Effect

An indirect method of measuring gas- and particulate-phase velocities of shock-induced dusty-gas flows

1992 ◽  
Vol 70 (2-3) ◽  
pp. 122-133
Author(s):  
James J. Gottlieb
Keyword(s):  
Phase Velocity ◽  
Mass Conservation ◽  
Time Of Arrival ◽  
Gas Flows ◽  
Dusty Gas ◽  
Particulate Phase ◽  
Two Phase ◽  
Gas Phases ◽  
Direct Measurements ◽  
Particulate Concentration

A method of indirectly measuring the temporally varying velocities of both the particulate and gas phases in the nonequilibrium region of a shock wave moving at constant speed in a dusty-gas mixture is described. This method is implemented by using experimental data from shock-induced air flows containing glass beads 40 μm in diameter in a dusty-gas shock-tube facility featuring a large horizontal channel 197 mm high by 76 mm wide with a special dust-injection device. Simultaneous measurements of the shock-front speed with time-of-arrival gauges, particulate concentration by light extinctiometry, and combined particulate concentration and gas density by beta-ray absorption are used in conjunction with two mass conservation laws to provide these indirect two-phase velocity measurements. Direct measurements of the particulate-phase velocity by laser-Doppler velocimetry are also presented for comparison, and the capability of the indirect velocity-measurement method is assessed.

Shock-wave reflection from a rigid wall in a dusty gas

1986 ◽  
Vol 404 (1826) ◽  
pp. 55-67 ◽  
Keyword(s):  
Shock Wave ◽  
Equations Of Motion ◽  
Rigid Wall ◽  
Incident Shock ◽  
Incident Shock Wave ◽  
Gas Analysis ◽  
Reflected Shock Wave ◽  
Dusty Gas ◽  
Splitting Technique ◽  
Reflected Shock

The flow that results when a shock wave in a dusty gas is reflected from a rigid wall is studied theoretically. By applying an idealized equilibrium gas analysis, it is shown that there are three types of shock reflection. The incident shock wave and the reflected shock wave are partly dispersed if the incident shock is strong the former is partly dispersed but the latter is fully dispersed if the incident shock is of intermediate strength and both of them are fully dispersed if the incident shock is weak. The equations of motion are also solved numerically with a modified random-choice method involving an operator splitting technique to study the time-dependent non-equilibrium flow. The results demonstrate the details of the formation of the reflected shock wave for the three types described.

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