Experimental and CFD Simulation of Heat Transfer to Highly Viscous Fluids in an Agitated Vessel Equipped With a non Standard Helical Ribbon Impeller

Delaplace, Guillaume; Torrez, C.; Leuliet, J. C.; Belaubre, N.; André, Christophe

doi:10.1205/02638760152721460

Cited by 33 publications

(24 citation statements)

References 15 publications

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“…However, only few papers were published on this kind of modelling in stirred vessels. A satisfactory agreement with experimental data was reported for heat transfer modelling under the laminar flow regime [1,2], whereas under the turbulent flow regime, the numerical simulation results were significantly under-predicted. That discrepancy referred to the fluid temperature rise at heating [3] or to Nusselt number [4] and was estimated at about (30±50)% [5] in terms of the jacket heat transfer coefficient.…”

Section: Introductionsupporting

confidence: 71%

CFD Modeling of Turbulent Jacket Heat Transfer in a Rushton Turbine Stirred Vessel

Zakrzewska

Jaworski

2004

Chem Eng & Technol

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CFD modelling of the turbulent heat transfer was performed for a stirred tank equipped with a Rushton turbine impeller and four standard baffles. Eight different turbulence models, i.e. the standard k-e, RNG k-e, realizable k-e, Chen-Kim k-e, optimized Chen-Kim k-e, standard k-x, k-x SST and Reynolds stress models, were used during the modelling. In all investigated cases, the boundary flow at the vessel wall was described by the standard logarithmic wall functions. The CFD modelling values of the local heat transfer coefficient were compared with the corresponding experimental data. The best agreement was obtained for the standard k-e, optimized Chen-Kim k-e and k-x SST models.

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Section: Introductionsupporting

confidence: 71%

CFD Modeling of Turbulent Jacket Heat Transfer in a Rushton Turbine Stirred Vessel

Zakrzewska

Jaworski

2004

Chem Eng & Technol

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“…Calculations illustrated in Fig. 7 are comparable to similar calculations presented by Delaplace et al (2001).…”

Section: Model Calculationssupporting

confidence: 85%

Heat transfer and power consumption for ribbon impellers. Mixing efficiency

Niedzielska

Kuncewicz

2005

Chemical Engineering Science

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“…The governing equations for the transport of the moisture-rich food waste are approximated using the continuity, momentum and the energy equations with the continuum assumption. Delaplace et al [16] numerically simulated the heat transfer of highly viscous Newtonian fluids at unsteady state in a jacketed vessel using CFD. The numerical results exhibited good agreement with the experimental values of some features, but there were discrepancies wtih the local thermal boundary layer and the global heat transfer measured experimentally.…”

Section: Introductionmentioning

confidence: 99%

Design of Stirrer Impeller with Variable Operational Speed for a Food Waste Homogenizer

2016

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Abstract:A conceptualized impeller called KIA is designed for impact agitation of food waste in a homogenizer. A comparative analysis of the performance of KIA is made with three conventional impeller types, Rushton, Anchor, and Pitched Blade. Solid-liquid mixing of a moisture-rich food waste is simulated under various operational speeds, in order to compare the dispersions and thermal distributions at homogenous slurry conditions. Using SolidWorks, the design of the impellers employs an Application Programming Interface (API) which acts as the canvas for creating a graphical user interface (GUI )for automation of its assembly. A parametric analysis of the homogenizer, at varying operational speeds, enables the estimation of the critical speed of the mixing shaft diameter and the deflection under numerous mixing conditions and impeller configurations. The numerical simulation of the moisture-rich food waste (approximated as a Newtonian carrot-orange soup) is performed with ANSYS CFX v.15.0. The velocity and temperature field distribution of the homogenizer for various impeller rotational speeds are analyzed. It is anticipated that the developed model will help in the selection of a suitable impeller for efficient mixing of food waste in the homogenizer.

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Experimental and CFD Simulation of Heat Transfer to Highly Viscous Fluids in an Agitated Vessel Equipped With a non Standard Helical Ribbon Impeller

Cited by 33 publications

References 15 publications

CFD Modeling of Turbulent Jacket Heat Transfer in a Rushton Turbine Stirred Vessel

CFD Modeling of Turbulent Jacket Heat Transfer in a Rushton Turbine Stirred Vessel

Heat transfer and power consumption for ribbon impellers. Mixing efficiency

Design of Stirrer Impeller with Variable Operational Speed for a Food Waste Homogenizer

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