Nonisothermal modeling of heat transfer inside an internal batch mixer
Nonisothermal modeling of heat transfer inside an internal batch mixer
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DOI：
10.1002/aic.12484
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发表时间：
2011-10
期刊：
影响因子：
3.7
通讯作者：
Yun Bai;U. Sundararaj;K. Nandakumar
中科院分区：
文献类型：
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作者：
Yun Bai;U. Sundararaj;K. Nandakumar
使用计算流体动力学（CFD）软件，来自ANSYS，Inc.的Polyflow 3.9，以获得聚合物熔体与混合器壁之间的温度分布和表征传热。通过实验验证了模拟得到的熔体温度。从463 K的均匀温度开始，当施加5.24 rad/s的旋转速度时，粘性加热导致聚乙烯（PE）树脂的最大温度上升为3 K，聚苯乙烯（PS）树脂的最大温度上升为6 K。间歇式混合器内的瞬态流场的特征在于与速度分布和混合指数参数，这表明层流占主导地位的混合器内，而一个小的百分比的拉伸流，收敛流，和再循环流也存在。© 2010美国化学工程师学会AIChE J，2011
A nonisothermal transient process of temperature increase due to viscous heating was simulated for a 69 cm3 internal batch mixer (BM) using a computational fluid dynamics (CFD) software, Polyflow 3.9 form ANSYS, Inc., to obtain the temporal temperature distribution and characterize the heat transfer between polymer melt and mixer wall. The melt temperature obtained from simulation was verified with experiments. Starting from a uniform temperature of 463 K, when a rotation speed of 5.24 rad/s is imposed, viscous heating caused a maximum temperature rise of 3 K for a polyethylene (PE) resin, and 6 K for a polystyrene (PS) resin. The transient flow fields inside the batch mixer were characterized with velocity profiles and a mixing index parameter, which show that laminar flow dominates inside the mixer while a small percentage of elongational flow, converging flow, and recirculation flow is also present. © 2010 American Institute of Chemical Engineers AIChE J, 2011