Multi-lamellae

This system is a chip version of three dimensional micro mixer-tube reactor setups [21]. It comprises a triangular interdigital micro mixer with a focusing zone that thins the multi-lamellae and a subsequent reaction channel that is surrounded... 

Interdigital micro mixers comprise feed channel arrays which lead to an alternating arrangement of feed streams generating multi-lamellae flows [39 2]. If processes have to be carried out with extended residence times (> 1 s) and/or at a temperature level different from the mixing step, tubes have to be attached to the interdigital micro mixers. Their internals comprise millimeter dimensions or below, if necessary. 

When the multi-lamellae pattern is vertical to the feed reservoir layers, this is named vertical multi-laminating. When both are oriented in the same way, this is the horizontal variant... 

Figure 1.77 A triangular focusing geometry for multi lamellae flows (source IMM).

M 38] [P 36] Using a reactive visualization experiment based on pH-driven color formation, the homogeneous texture of the color of the mixed flow at the end of the mixing chamber suggests that mixing was not far from completion for a vertical multi-lamellae flow (3.5 kPa 0.9 pi min-1) [67]. 

Hence, the main information is that the in-line concentration profiles confirm the uniform multi-lamellae formation over a favorable large range of flow rates given already by photographic flow-pattern imaging (see Multi-lamination patterns) [20],... 

Luciferin/luciferase reaction to monitor multi-lamellae formation/interdigital structures for biochemical applications... 

Variations of this method include the use of a fluorescent dye such as fluorescein or Rhodamine. Depending on the visualization technique used, the uncertainty between perfect mixing and multi-lamellae flow may still be detrimental to proper quantification of the mixing quality. Nevertheless, the use of confocal scanning microscopy enables one to perform three-dimensional imaging of the flow and distinguish between these conflgurations [17, 34, 38]. 

P 27] Diazotation was performed in batchwise manner [55]. A CPC micro reactor with multi-lamination mixer (lamellae < 100 pm) was embedded in a housing... 

Abstract The morphology of polyethylene has been an important theme in polymer science for more than 50 years. This review provides an historical background and presents the important findings on five specialised topics the crystal thickness, the nature of the fold surface, the lateral habit of the crystals, how the spherulite develops from the crystal lamellae, and multi-component crystallisation and segregation of low molar mass and branched species. 

M 43] [P 39] A regular multi-lamination pattern composed of 30 lamellae is found for a triangular interdigital mixer [20,39], Within the limits of a photographic image no notable deviations are observed. 

Figure 1.94 Multi-lamination flow pattern superposed by focusing in the slit-shaped interdigital micro mixer. Blurred zones indicate lamellae tilting and winding within the entire focusing zone [20] (by courtesy of AlChE).

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