Problems of Heat Transfer in Agitated Vessels

Cudak, Magdalena; Major-Godlewska, Marta; Karcz, J.

doi:10.1007/978-3-319-73978-6_3

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…It has been shown that the disc turbine requires the lower specific power than the pitched bladed or hydrofoil impellers under baffled conditions. Under unbaffled conditions, this observation is different from reported in the literature [109][110][111] which showed that at higher power number mixing is more efficient under unbaffled conditions (C v = 0.40 v/v, solids volume concentration). The best solid particles concentration at which ε js is minimum and ratio P js /M s is evaluated as the total mass of solid particles suspended, also defined by Drewer et al [105].…”

Section: Solid Suspensioncontrasting

confidence: 99%

“…To evaluate energy consumption during solids suspension in an agitated vessel the specific impeller consumption (ratio of agitator power required for just-off-bottom solids particle suspension to vessel volume-(P js /V) can be used and specific impeller power requirement ε js (ε js =P js /M s , where M s it's solids mass) at N js are depend to solids concentration (C v ), particles size and impeller type [109]. The above parameters dramatically increase after exceeding the certain specified of minimum value C v for the same rotor.…”

Section: Solid Suspensionmentioning

confidence: 99%

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A General Review of the Current Development of Mechanically Agitated Vessels

Jaszczur

Młynarczykowska

2020

Processes

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The mixing process in a mechanically agitated vessel is a widespread phenomenon which plays an important role among industrial processes. In that process, one of the crucial parameters, the mixing efficiency, depends on a large number of geometrical factors, as well as process parameters and complex interactions between the phases which are still not well understood. In the last decade, large progress has been made in optimisation, construction and numerical and experimental analysis of mechanically agitated vessels. In this review, the current state in this field has been presented. It shows that advanced computational fluid dynamic techniques for multiphase flow analysis with reactions and modern experimental techniques can be used with success to analyse in detail mixing features in liquid-liquid, gas-liquid, solid-liquid and in more than two-phase flows. The objective is to show the most important research recently carried out.

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Section: Solid Suspensioncontrasting

confidence: 99%

Section: Solid Suspensionmentioning

confidence: 99%

A General Review of the Current Development of Mechanically Agitated Vessels

Jaszczur

Młynarczykowska

2020

Processes

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“…Clearance between sensors in the fourth column was 25 mm. Cathodic reduction of the potassium ferricyanide K 3 Fe(CN) 6 was employed as a measuring system. At each measuring point (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Problems of heat transfer in agitated vessels, including theoretical backgrounds, methods of experiments and computations, as well as obtained results have been considered in detail in the following monographs [1][2][3] and papers [4][5][6] . The results of the mean heat transfer coefficient have been given in literature for different agitated liquids, for example: viscous fluids 7-10 , non-Newtonian fluids [10][11][12][13][14] and others [15][16] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Modelling of Local Heat Transfer Process for a Gas-liquid System in an Agitated Vessel with the System of A 315 – RT ImpellersExperimental Modelling of Local Heat Transfer Process for a Gas-liquid System in an Agitated Vessel with the System of A 315 – RT Impellers

Bielka¹

2018

Chem.Biochem.Eng.Q.

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The results of the experimental studies of the local heat transfer process for a gas-liquid system in the region of the cylindrical wall of baffled agitated vessel equipped with the system of A 315 (lower) -RT (upper) impellers are presented. Newtonian liquids of different physical properties and air were used as continuous and dispersed phases, respectively. Local heat transfer coefficients were measured using both thermal and electrochemical methods. Distributions of the heat transfer coefficients were described by means of equations (13) - (16) and (17) -(21), separately, for turbulent and transitional ranges of the fluid flow in the agitated vessel. These equations, concerning both coalescing and non-coalescing gas-liquid systems, have no equivalent in the open literature. Moreover, the results for the A 315 -RT impeller system were compared with our previous heat transfer data obtained using CD 6 -RT or RT -RT impeller systems.

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Problems of Heat Transfer in Agitated Vessels

Cited by 2 publications

References 9 publications

A General Review of the Current Development of Mechanically Agitated Vessels

A General Review of the Current Development of Mechanically Agitated Vessels

Experimental Modelling of Local Heat Transfer Process for a Gas-liquid System in an Agitated Vessel with the System of A 315 – RT ImpellersExperimental Modelling of Local Heat Transfer Process for a Gas-liquid System in an Agitated Vessel with the System of A 315 – RT Impellers

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