| 搅拌槽内非牛顿流体流动场的数值模拟 |
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| 引用本文： | 周国忠,聂毅强,包雨云,施力田,王英琛. 搅拌槽内非牛顿流体流动场的数值模拟[J]. 北京化工大学学报(自然科学版), 2002, 29(4): 4-7. DOI: 10.3969/j.issn.1671-4628.2002.04.002 |
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| 作者姓名： | 周国忠 聂毅强 包雨云 施力田 王英琛 |
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| 作者单位： | 北京化工大学化学工程学院,北京,100029 |
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| 基金项目： | 国家自然科学基金;29976002; |
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| 摘 要： | 对搅拌槽内非牛顿流体湍流流动的数值研究还很缺乏.文中尝试利用k-ε模型计算了假塑性流体羧甲基纤维素钠(CMC)水溶液在搅拌槽内的三维流动场,并与粒子成像测速(PIV)法测得的实验结果进行了比较.计算结果表明,非牛顿流体CMC水溶液的宏观流动场与牛顿流体(水)的流动场有较大差异,主要是主体流动减弱,并在叶端附近形成涡旋流动.主体流动区内的速度分布与PIV测量结果吻合较好.剪切速率在槽内的分布相差较大,桨叶附近与槽壁处的剪切速率较大,在主体流动区域较小.
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| 关 键 词： | 非牛顿流体 搅拌槽 湍流流动 数值模拟 |
| 修稿时间： | 2001-09-30 |
Numerical simulation of non-Newtonian fluid flow in a stirred tank |
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| ZHOU Guo zhong NIE Yi qiang BAO Yu yun SHI Li tian WANG Ying chen. Numerical simulation of non-Newtonian fluid flow in a stirred tank[J]. Journal of Beijing University of Chemical Technology, 2002, 29(4): 4-7. DOI: 10.3969/j.issn.1671-4628.2002.04.002 |
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| Authors: | ZHOU Guo zhong NIE Yi qiang BAO Yu yun SHI Li tian WANG Ying chen |
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| Affiliation: | College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | Numerical simulation of non-Newtonian turbulent flow in a stirred tank is still on an early age and further development is needed. In this paper , the flow field of a shear thinning fluid-carboxymethylcellulose (CMC) was simulated using standard k-ε model. The results predicted a distinct difference in velocity distribution between a shear thinning fluid and a simple Newtonian fluid(water) . The main circulation loop was decreased and a swirl flow was formed at the tip of the impeller. The predicted non-Newtonian fluid velocity agreed well with velocity measured by Particle Image Velocimet ry (PIV) . The simulated shear rate distribution is different in the whole tank and its value near the impeller and tank wall is high. |
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| Keywords: | non Newtonian fluid stirred tank turbulent flow numerical simulation |
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