CFD Study on Heat Transfer to Bingham Fluid During with Gate Impeller


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Abstract


In this work, we study the case of highly viscous fluids in a classical system of agitation: a cylindrical tank with plate bottom without obstacles agitated by a gate impeller agitator. We devote to a numerical approach carried out using an industrial code CFD Fluent 6.2.13 based on the finite volumes method discretization of Navier - Stokes equations formulated in variables (U.V.P). The threshold of flow related to the viscoplastic behaviour is modelled by a theoretical law of Bingham. Heat transfer to Bingham plastic fluids in an agitated vessel .It is a commonly used in chemical and food industry processes. However, little is known about the effects of mixing system geometry and the influence of rheological properties of the liquids on the heat transfer phenomenon. The hydrodynamic and thermal behaviours induced by gate agitator. Heat transfer is applied on the jacketed wall of the stirred vessel. Solutions of the time-averaged Navier–Stokes and energy equations are developed using a control volume discretization method. Streamlines and isotherm represent the corresponding flow, field and the global distributions of Nusselt number are also presented.
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Keywords


Agitated Vessel; 2D Modeling; Bingham Fluid; Heat Transfer; Gate Impeller; CFD

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References


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