Novel static mixers for surge dampening

Nauman, E. Bruce; Smith, Oliver J.

doi:10.1016/j.cherd.2008.08.024

Cited by 2 publications

(1 citation statement)

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“…Considering pressure drop along the static mixer and mixing performance as the two key parameters in the design of static mixers, a wealth of researches have been focused on designing novel models applicable for both Newtonian and non‐Newtonian fluids. Although a large portion of these models are presented by simulation and was not supported by experimental data, 7,18‐20 however, some of them demonstrated in laboratory scale 21‐25 . A main problem in some of these models is the difficulty of construction which causes their applicability to be doubted.…”

Section: Introductionmentioning

confidence: 99%

Improving mixing performance by curved‐blade static mixer

Mahmoodi

Razzaghi

2020

AIChE Journal

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This article addresses design modification to a flat-blade static mixer to enhance mixing performance. The static mixer elements used in this work consist of four blades with curvature made to intensify turbulent-like flow, while reducing the pressure drop. The blades were mounted on a cylindrical housing with 45 rotation relative to the axial direction. The mixer assembly was used in three different arrangements of 8, 10, and 14 elements for a range of Reynolds number between 600 and 7,000. The coefficient of variance (COV) of samples was used to measure the mixing quality. The curved-blade mixer provides considerable improvement in mixing quality compared with the flat-blade mixer and comparable to the SMX mixer. Compared with the flat-blade static mixer, the new design reduces the COV by up to about 50%. This effect is more pronounced when the number of mixing elements increases. Furthermore, the friction factors for the modified mixer, obtained at a wide range of Reynolds number, were apparently smaller than those for the flat-blade, SMX, and SMV mixers. The correlation presented for the friction factor, when all mixer arrangements and aspect ratios were considered, supports the experimental data with ±15% deviation.

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Section: Introductionmentioning

confidence: 99%