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首页> 外文期刊>Bioprocess and Biosystems Engineering >Axial dispersion in packed bed reactors involving viscoinelastic and viscoelastic non-Newtonian fluids
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Axial dispersion in packed bed reactors involving viscoinelastic and viscoelastic non-Newtonian fluids

机译：涉及粘弹性和粘弹性非牛顿流体的填充床反应器中的轴向分散

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摘要

Axial dispersion is an important parameter in the performance of packed bed reactors. A lot of fluids exhibit non-Newtonian behaviour but the effect of rheo-logical parameters on axial dispersion is not available in literature. The effect of rheology on axial dispersion has been analysed for viscoinelastic and viscoelastic non-Newtonian fluids. Aqueous solutions of carboxymethyl cellulose and polyacrylamide have been chosen to represent viscoinelastic and viscoelastic liquid-phases. Axial dispersion has been measured in terms of Bo_L number. The single parameter axial dispersion model has been applied to analyse RTD response curve. The Bo_L numbers were observed to increase with increase in liquid flow rate and consistency index 'A" for viscoinelastic as well as viscoelastic fluids. Bodenstein correlation for Newtonian fluids proposed has been modified to account for the effect of fluid rheology. Further, Weissenberg number is introduced to quantify the effect of viscoelasticity.
机译：轴向分散是填充床反应器性能的重要参数。许多流体表现出非牛顿行为，但是流变学参数对轴向弥散的影响在文献中尚不可用。对于粘弹性和粘弹性非牛顿流体，已经分析了流变学对轴向分散的影响。已选择羧甲基纤维素和聚丙烯酰胺的水溶液代表粘弹性和粘弹性液相。轴向弥散度已根据Bo_L数进行了测量。采用单参数轴向弥散模型分析RTD响应曲线。观察到Bo_L数随粘弹性流体和粘弹性流体的液体流速和稠度指数“ A”的增加而增加，对牛顿流体的Bodenstein相关性进行了修正，以考虑流体流变学的影响。介绍量化粘弹性的影响。

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