Solids flow pattern in continuous oscillatory baffled reactor

Slavnić, Danijela S.; Bugarski, Branko; Nikačević, Nikola M.

doi:10.1016/j.cep.2018.11.017

Cited by 14 publications

(14 citation statements)

References 35 publications

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“…Channel 2 is the exception to this rule as v osc / v t and P / V increase monotonically with f . It is also noteworthy that v osc / v t is higher than 7 in the whole range of frequencies in all three channels and, in addition, P / V is higher than 227 W m –3 in most cases, which corresponds to the “Solid washout” regime, as defined by Slavnić et al …”

Section: Results and Discussionmentioning

confidence: 54%

“…This dimensionless group was proposed by Mackley et al . and has been used to compare the efficiency of OFRs to suspend solids with different operating conditions and geometries and also to classify the solid flow regime . The ratio between the input axial velocity and the generated radial velocity depends on the operating conditions and geometry of the OFR.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Finally, the suspension of solids also depends on the energy input, expressed as the power input per unit volume, P / V , calculated as where N c is the number of identical constrictions per unit length and C 0 is the standard orifice discharge coefficient usually taken as 0.7. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…This dimensionless group was proposed by Mackley et al 21 and has been used to compare the efficiency of OFRs to suspend solids with different operating conditions 39 and geometries 36 and also to classify the solid flow regime. 45 The ratio between the input axial velocity and the generated radial velocity depends on the operating conditions and geometry of the OFR. Therefore, a lower velocity ratio is an indicator that a particular operating condition or geometry is more effective in generating the radial velocity required to suspend the solids.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…where N c is the number of identical constrictions per unit length and C 0 is the standard orifice discharge coefficient usually taken as 0.7. 45,47 Figures 10−12 display the experimental results for x 0,crit , v osc /v t , and P/V, respectively. It should be noted that when channel 3 was operated at f = 1 Hz and f = 8 Hz, the solids were not fully suspended even with the maximum amplitude provided by the linear motor (20 mm at the piston, corresponding to 32 mm in the straight section of the channel).…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Mixing Performance of Planar Oscillatory Flow Reactors with Liquid Solutions and Solid Suspensions

Cruz

Silva

Rocha

et al. 2021

Ind. Eng. Chem. Res.

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The mixing performance of planar oscillatory flow reactors (planar-OFRs) with liquid solutions and solid suspensions was investigated. The planar-OFR is a relatively new variant of the OFR where the conventional sharp-edged periodic constrictions are replaced with smooth periodic constrictions and the conventional circular cross-section is replaced with a rectangular cross-section. The experimental results show that both the minimum mixing intensity required to fully suspend solids and the time required to reach a specific degree of concentration uniformity after injection of a liquid or solid tracer largely depend on the operating conditions, such as the frequency and amplitude of oscillation and the geometric parameters, such as the cell aspect ratio and the ratio of the open constriction area to the straight section area, in the planar-OFR.

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Section: Results and Discussionmentioning

confidence: 54%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Mixing Performance of Planar Oscillatory Flow Reactors with Liquid Solutions and Solid Suspensions

Cruz

Silva

Rocha

et al. 2021

Ind. Eng. Chem. Res.

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Oscillatory flow reactors for synthetic chemistry applications

2020

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Oscillatory flow reactors (OFRs) superimpose an oscillatory flow to the net movement through a flow reactor. OFRs have been engineered to enable improved mixing, excellent heat- and mass transfer and good plug flow character under a broad range of operating conditions. Such features render these reactors appealing, since they are suitable for reactions that require long residence times, improved mass transfer (such as in biphasic liquid-liquid systems) or to homogeneously suspend solid particles. Various OFR configurations, offering specific features, have been developed over the past two decades, with significant progress still being made. This review outlines the principles and recent advances in OFR technology and overviews the synthetic applications of OFRs for liquid-liquid and solid-liquid biphasic systems.

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