Mass transfer characteristics of liquid–liquid flow in small diameter conduits

Biswas, Koushik; Das, Gargi; Ray, Subhabrata; Basu, Jayanta Kumar

doi:10.1016/j.ces.2014.07.029

Cited by 36 publications

(38 citation statements)

References 20 publications

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“…A survey of the past literature [3,16] and experiments by the present authors [17] suggests that miniaturization brings about process intensification since it is accompanied by an increased parametric range of slug flow [3,16]. Slug flow enhances mass transfer characteristics due to the coupled effect of internal circulation due to convection within each slugs and diffusion between slugs of adjacent phases [3].…”

Section: Rationale Behind the Designmentioning

confidence: 91%

“…Accordingly, the study proposes a compact device comprising of a manifold of 90°bends connecting short horizontal and long vertical up and downflow sections. We also note [17] a significant effect of orientation on mass transfer co-efficient during liquid-liquid flow in straight conduits -the highest mass transfer occurs during downflow and the least during horizontal flow of the two liquids. Accordingly, the device is oriented to ensure a greater proportion of downflow with a minimum proportion of horizontal flow.…”

Section: Rationale Behind the Designmentioning

confidence: 96%

“…This system comprises of two pumps and four flowmeters to circulate measured flows (Q W and Q T ) of the liquids through the test sections. The details of the flow arrangement is discussed and presented in Biswas et al [17]. Its performance is compared with a single bend device of same total length (0.8 m) and inside diameter of 2 mm designated as Device 2 in Fig.…”

Section: Testing Of the Device/ Experimentation To Test The Devicementioning

confidence: 99%

“…1. The details of the experimental procedure adopted to ensure an accurate value of C Wout is elaborated in Biswas et al [17]. ''m'' is the slope of the equilibrium curve C Ã w = m C T and it is 4.05 for the present system.…”

Section: Testing Of the Device/ Experimentation To Test The Devicementioning

confidence: 99%

“…For single component (acetic acid) diffusion from the organic to the aqueous phase ensured by using mutually saturated water and toluene for the experiments, the overall volumetric mass transfer co-efficient (k ova) can be expressed [17] as …”

Section: Testing Of the Device/ Experimentation To Test The Devicementioning

confidence: 99%

See 4 more Smart Citations

A simple flow device for enhanced mass transfer in reduced dimensions

Biswas

Ray

Das

et al. 2015

Chemical Engineering Journal

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Section: Rationale Behind the Designmentioning

confidence: 91%

Section: Rationale Behind the Designmentioning

confidence: 96%

Section: Testing Of the Device/ Experimentation To Test The Devicementioning

confidence: 99%

Section: Testing Of the Device/ Experimentation To Test The Devicementioning

confidence: 99%

Section: Testing Of the Device/ Experimentation To Test The Devicementioning

confidence: 99%

See 3 more Smart Citations

A simple flow device for enhanced mass transfer in reduced dimensions

Biswas

Ray

Das

et al. 2015

Chemical Engineering Journal

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Liquid‐liquid flow patterns in reduced dimension based on energy minimization approach

2015

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Study of liquid-liquid flow patterns in reduced dimensions is relevant under the current trends to miniaturize process equipment. The phase distribution results from interplay of surface (dominant in microchannels) and gravity forces (dominant in larger dimensions). The proposed analysis, based on minimization of total system energy comprising of kinetic, surface, and potential energy, unravels the influence of wetting properties and predicts the range of existence of annular and plug flow as well as the onset of stratification with increasing conduit dimension. Unlike existing models marking abrupt transitions, the proposed methodology can predict zones of transition where interfacial distributions gradually evolve with change of operating conditions-the predictions agreeing closely to experimental and literature data. The analysis illustrates the coupled effect of diameter, contact angle, and inlet composition on flow distribution and defines the transition from macrodomain to microdomain (millichannels) in terms of Bond number as 0.1 < Bo < 10. DiscussionsA close observation of the energy expressions reveal that tube diameter is a key parameter for organizing the different Figure 2. Algorithm to identify the stable flow pattern based on energy minimization approach.

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