Aggregation and breakup of colloidal particle aggregates in shear flow, studied with video microscopy

Langmuir

Volumn 20, Issue 7, 2004, Pages 2614-2627

  Tolpekin, V A ^a   Duits, M H G ^a   Van Den Ende, D ^a   Mellema, J ^a  

^a UNIVERSITY OF TWENTE   (Netherlands)

Author keywords

[No Author keywords available]

Indexed keywords

AGGLOMERATION; COLLOIDS; COMPOSITION EFFECTS; DISPERSIONS; DROP BREAKUP; MICROSCOPIC EXAMINATION; PARTICLES (PARTICULATE MATTER); REFRACTIVE INDEX; SHEAR FLOW; STRUCTURE (COMPOSITION); SUSPENSIONS (FLUIDS);

AGGREGATE SIZE DISTRIBUTIONS; COHESIVE FORCES; COLLOIDAL PARTICLE AGGREGATES; INTERNAL AGGREGATE STRUCTURE; POLYMER CONCENTRATION; VIDEO MICROSCOPY;

SILICA;

EID: 1842728382     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la035758l     Document Type: Article

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24. 8 = vδt with the real exposure time δt = 58 ± 3 ms (see Figure 5 for an illustration). Here v is the fluid velocity in the plane of observation. It should be noted that this quantity varies with the position above the bottom of the cell (z), as well as with the radial position (r). Measuring it for single particles at various r, z positions revealed that v showed a quantitative correspondence with r and z, as expected for affine motion: v = zγ = z(ωr/H) the plate-plate distance in the shear cell.
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