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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >NUMERICAL SIMULATIONS OF NON-ISOTHERMAL FLOW IN OFF-AXIS ROTATION OF A CAN CONTAINING A HEADSPACE BUBBLE
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NUMERICAL SIMULATIONS OF NON-ISOTHERMAL FLOW IN OFF-AXIS ROTATION OF A CAN CONTAINING A HEADSPACE BUBBLE

机译：非等温流动的数值模拟离轴的旋转可以包含一个顶部空间泡沫

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摘要

This paper describes numerical simulations of the non-isothermal,laminar flow of Newtonian and non-Newtonian liquids inside rotating cylindrical cans containing a headspace air bubble.Two modes of rotation are considered: axial rotation about a horizontal axis and end-over-end rotation.The rotational speed is held constant so that once initial transients have decayed the flow field in both cases is periodic.The aim of the numerical simulations,carried out using the ANSYS CFX computational fluid dynamics software,is to compare liquid heating times for different flow conditions.To reduce computational run times the calculations are carried out for a liquid with an artificially high value of thermal diffusivity.For axial rotation the simulations have been carried out using 2D and 3D models and it is shown that a 2D model can identify trends in heating times.In both end-over-end and axial modes,rotational speeds and radii of rotation are identified which minimize the heating time.The conditions are shown to correspond closely to those which maximize a measure of mixing in previous studies of isothermal flow.
机译：本文描述的数值模拟非等温层流牛顿和非牛顿液体旋转圆柱内包含顶部空间空气泡沫罐。旋转被认为是:轴向旋转水平轴和立式圆筒形旋转。转速保持不变,这样一次流场的初始瞬变腐朽这两种情况下是周期性的。模拟,使用ANSYS进行排名计算流体动力学软件,是比较不同流液体加热时间条件。对液体进行计算人为热的高价值扩散系数。进行了使用2 d和3 d模型和结果表明,2 d模型可以确定趋势在加热时间。模式,旋转速度和旋转半径减少加热时间的确定。条件是密切对应那些最大的混合先前的研究的等温流动。

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