Particle motion driven by non-uniform thermodynamic forces

Abstract The paper presents the summary of research on polymer melt particle motion trajectories in a disc zone of a screw-disk extruder. We analysed two models of its structure, different in levels of taken simplifications. The analysis includes computer simulations of material particle flow and results of experimental tests to determine the properties of the resultant extrudate. Analysis of the results shows that the motion of melt in the disk zone of a screw-disk extruder is a superposition of pressure and dragged streams. The observed trajectories of polymer particles and relations of mechanical properties and elongation of the molecular chain proved the presence of a stretching effect on polymer molecular chains.

Download Full-text

ANALYSIS OF PARTICLE MOTION IN FRICTION SEPARATOR

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2018-4-0-197-203 ◽

2018 ◽

Vol 4 ◽

pp. 197-203

Author(s):

V.Ya. Potapov ◽

◽

V.N. Makarov ◽

V.V. Potapov ◽

N.V. Makarov ◽

...

Keyword(s):

Particle Motion

Download Full-text

Development of semi-realtime velocity measuring method by an analysis of pictures of particle motion.

JOURNAL OF THE FLOW VISUALIZATION SOCIETY OF JAPAN ◽

10.3154/jvs1981.8.273 ◽

1988 ◽

Vol 8 (30) ◽

pp. 273-276

Author(s):

Tomomasa Uemura ◽

Hiroaki Hasegawa

Keyword(s):

Particle Motion ◽

Measuring Method ◽

Velocity Measuring

Download Full-text

Integrable unsteady motion with an application to ocean eddies

Nonlinear Processes in Geophysics ◽

10.5194/npg-5-145-1998 ◽

1998 ◽

Vol 5 (3) ◽

pp. 145-151

Author(s):

A. D. Kirwan, Jr. ◽

B. L. Lipphardt, Jr.

Keyword(s):

Potential Vorticity ◽

Particle Motion ◽

Gulf Stream ◽

Incompressible Flows ◽

Unsteady Motion ◽

Ring System ◽

Time Dependent ◽

Two Dimensional ◽

Ocean Eddies ◽

Multilayered Systems

Abstract. Application of the Brown-Samelson theorem, which shows that particle motion is integrable in a class of vorticity-conserving, two-dimensional incompressible flows, is extended here to a class of explicit time dependent dynamically balanced flows in multilayered systems. Particle motion for nonsteady two-dimensional flows with discontinuities in the vorticity or potential vorticity fields (modon solutions) is shown to be integrable. An example of a two-layer modon solution constrained by observations of a Gulf Stream ring system is discussed.

Download Full-text