Rapid two-dimensional imaging of bubbles and slugs in a three-dimensional, gas-solid, two-phase flow system using ultrafast magnetic resonance

被引：38

作者：

Muller, C. R. ^{[1
]}

Holland, D. J. ^{[1
]}

Davidson, J. F. ^{[1
]}

Dennis, J. S. ^{[1
]}

Gladden, L. F. ^{[1
]}

Hayhurst, A. N. ^{[1
]}

Mantle, M. D. ^{[1
]}

Sederman, A. J. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, England

来源：

PHYSICAL REVIEW E | 2007年 / 75卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevE.75.020302

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Ultrafast magnetic resonance has been applied to measure the geometry of bubbles and slugs in a three-dimensional gas-solid two-phase flow. A bed of particles of diameter 0.5 mm were fluidized with gas velocities in the range of 0.08-0.26 m/s. Bubbles were imaged in transverse as well as vertical planes with an acquisition time of down to 25 ms and a spatial resolution down to 1.7 mm. Owing to the ultrafast character of these measurements, it is not only possible to evaluate correlations, e.g., for the bubble diameter, but also evaluate models of complex hydrodynamic phenomena, such as the splitting and coalescence of bubbles.

引用

页数：4

共 26 条

[1] A Taylor vortex analogy in granular flows [J].

Conway, SL ;

Shinbrot, T ;

Glasser, BJ .

NATURE, 2004, 431 (7007) :433-437

[2]

DARTON RC, 1977, T I CHEM ENG-LOND, V55, P274

[3] GRANULAR CONVECTION OBSERVED BY MAGNETIC-RESONANCE-IMAGING [J].

EHRICHS, EE ;

JAEGER, HM ;

KARCZMAR, GS ;

KNIGHT, JB ;

KUPERMAN, VY ;

NAGEL, SR .

SCIENCE, 1995, 267 (5204) :1632-1634

[4] INSTABILITY IN A SAND HEAP [J].

EVESQUE, P ;

RAJCHENBACH, J .

PHYSICAL REVIEW LETTERS, 1989, 62 (01) :44-46

[5] A study of the mixing of solids in gas-fluidized beds, using ultra-fast MRI [J].

Fennell, PS ;

Davidson, JF ;

Dennis, JS ;

Gladden, LF ;

Hayhurst, AN ;

Mantle, MD ;

Müller, CR ;

Rees, AC ;

Scott, SA ;

Sederman, AJ .

CHEMICAL ENGINEERING SCIENCE, 2005, 60 (07) :2085-2088

[6] FLASH IMAGING - RAPID NMR IMAGING USING LOW FLIP-ANGLE PULSES [J].

HAASE, A ;

FRAHM, J ;

MATTHAEI, D ;

HANICKE, W ;

MERBOLDT, KD .

JOURNAL OF MAGNETIC RESONANCE, 1986, 67 (02) :258-266

[7] Application of k- and q-space encoding NMR techniques on granular media in a 3D model fluidized bed reactor [J].

Harms, S ;

Stapf, S ;

Blümich, B .

JOURNAL OF MAGNETIC RESONANCE, 2006, 178 (02) :308-317

[8]

Harrison D., 1962, S INT FLUIDS PART I, P127

[9] Bulk segregation in rotated granular material measured by magnetic resonance imaging [J].

Hill, KM ;

Caprihan, A ;

Kakalios, J .

PHYSICAL REVIEW LETTERS, 1997, 78 (01) :50-53

[10] NMR experiments on a three-dimensional vibrofluidized granular medium [J].

Huan, C ;

Yang, XY ;

Candela, D ;

Mair, RW ;

Walsworth, RL .

PHYSICAL REVIEW E, 2004, 69 (04) :13

← 1 2 3 →