The Kenics static mixer: new data and proposed correlations

Joshi, Prathamesh S.; Nigam, K.D.P.; Nauman, E. Bruce

doi:10.1016/0923-0467(94)02948-2

Cited by 42 publications

(39 citation statements)

References 4 publications

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“…Efforts have been mostly aimed at creating heuristic guidelines for selecting mixing equipment based on cost, type of appli-Ž cation, residence time, phases to be mixed, and so on Naumann, 1982;Cybulski and Werner, 1986;Koiranen et al, 1994; . Joshi et al, 1995 . Such an approach may help avoid gross Ž .…”

Section: Introductionmentioning

confidence: 95%

Characterization of flow and mixing in an SMX static mixer

et al. 2002

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Section: Introductionmentioning

confidence: 95%

Characterization of flow and mixing in an SMX static mixer

et al. 2002

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“…The static mixer as a heat exchanger with helical elements has been experimentally studied by Grace in 1971 and Joshi in 1995, and the empirical correlations for Nusselt number and friction factor were proposed as follows [2,10] Fig. 3 (a) and (b).…”

Section: B Model Validationmentioning

confidence: 99%

Heat Transfer Characteristics of a Solid-Liquid Mixture Rotation Baffle Heat Exchanger

Zhao¹,

Huang

Jun

et al. 2012

2012 Asia-Pacific Power and Energy Engineering Conference

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In this paper, three-dimensional numerical simulation was performed for a solid-liquid mixture rotation baffle heat exchangers (SLMBH). The vector field, temperature field and stream line inside the solid-liquid static heat exchanger were studied. The influence of Reynolds number, baffle interval and tube radius on the heat transfer was analyzed. The results have been compared with the results that of smooth tube. It shows that with the increase of the baffle interval or the tube radius, the heat transfer could be enhanced in mix section. And the numerical results were also discussed based on the viewpoint of the Field Synergy Principle. The reason of the heat transfer enhancement in the SLMBH is that the intersection angle between velocity and temperature gradient is increased.

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“…The increase in the pressure drop is acceptable (typically by 20-100%, depending upon the Dean number and the relative curvature of the helicoidal coils; see Manlapaz and Churchill [9]), but the smart techniques based on Dean vortices cannot be applied for straight pipes and for very small Reynolds number flows (e.g., for pasteurization of quark, yoghurt, etc, see Sestak et al [10]). In this case, frequent use is made of tube inserts, e.g., metallic meshes, discs, twisted tapes, wire coils, or static mixers, which enhance the heat transfer by about 150-200%, at the cost of an almost 10-fold increase in the pressure drop (Kenics static mixers) see [11][12][13]. Using the Sulzer SMX meshed static mixer, which can be considered also as a chaotic dynamic system, 4 to 5 times higher heat transfer enhancement can be achieved, but at the cost of a more than 20-fold increase in the pressure drop at Reynolds number 0.1 to 10; see Li et al [14].…”

Section: Introductionmentioning

confidence: 98%

Heat Transfer Enhancement in a Pipe Using a Flow Inverter

Žitný

Luong

Šesták

2009

Heat Transfer Engineering

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Flow inversion, transferring a liquid from the wall region toward the center of the pipe or from the axis toward the heat transfer surface, improves heat transfer in the laminar flow regime. While a fully developed velocity profile is quickly established, a thin thermal boundary layer is preserved for a considerable distance in the pipe behind the flow inverter for highly viscous liquids. Thus the pressure drop is increased only locally (by the inverter itself), while heat transfer enhancement is also seen in a long straight section of the pipe. Two original flow inverter designs were tested in a long pipe (3 m in length) heated by condensing steam, using starch molasses as a working medium. Experiments carried out in the range of Reynolds number 4-60 and Graetz number 150-700 resulted in an increase of 20-35% in the heat transfer coefficient, accompanied by a 30-40% increase in the pressure drop. The experimental results confirm the numerical model prediction (within an extendedReynolds number range starting from 0.1). Thus an almost 40% increase in heat transfer can be expected at the optimal Graetz number in the range 50-100, using only one flow inverter located in the middle of a sufficiently long pipe.

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The Kenics static mixer: new data and proposed correlations

Cited by 42 publications

References 4 publications

Characterization of flow and mixing in an SMX static mixer

Characterization of flow and mixing in an SMX static mixer

Heat Transfer Characteristics of a Solid-Liquid Mixture Rotation Baffle Heat Exchanger

Heat Transfer Enhancement in a Pipe Using a Flow Inverter

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