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【求助】 【英文化工文献的摘要，大概意思就行】【有效期至6月25日】
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Chemical Engineering Science 61 (2006) 218 – 228 Validation of bubble breakage, coalescence and mass transfer models for gas–liquid dispersion in agitated vessel Abstract Bubble breakage and coalescence phenomena and multicomponent gas–liquid mass transfer were studied in a 194 dm3 Rushton turbine agitated vessel. Local bubble size distributions (BSD) were measured from air–tap water system at several agitation conditions with capillary suction probe (CSP) technique. The CSP was compared to the digital imaging (DI) and phase Doppler anemometry (PDA) techniques in a 14 dm3 stirred vessel. The volumetric BSDs between the CSP and DI were in agreement, but number BSDs showed notable deviation. The limitations of measurement techniques seem to be the main reason.A multiblock stirred tank model with discretized population balances for bubbles and two-film Maxwell–Stefan multicomponent mass transfer between gas and liquid was created for the 194 dm3 agitated vessel. The model considers local mass transfer conditions in the vessel and is simple enough for the mathematical optimization of unknown model parameters. Unknown parameters in the mechanistic bubble breakage and coalescence models were fitted against measured local BSDs. After this, a parameter in the liquid film mass transfer correlation was adjusted against absorption and desorption experiments of oxygen. Local gas–liquid mass transfer areas were calculated from the population balance model. The simulations with the validated models show good agreement against experiments. On the other hand, the fitted parameters deviate from the theoretical values, which emphasizes the need of model validation against accurate experiments.Due to their fundamental character and the validation process, the fitted models seem to be useful tools for the design and scale-up of agitated gas–liquid reactors._ 2005 Elsevier Ltd. All rights reserved. Keywords: Bubble size distribution; Mass Transfer; Mixing; Multiphase flow; Parameter identification; Population balance。 这是一片文献的的开头（题目，摘要），我想知道它的大致内容。另外请把题目和关键词准确翻译出来，谢谢了。 [ Last edited by wxg2525 on 2009-6-9 at 16:06 ] |
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safa的回答来自翻译软件，大家都是虫子，就不要这样做了，thanks all the same. 3楼的朋友谢谢，能不能把摘要部分在详细的说一些。 Article Outline 1. Motivation and objectives 2. Experimental 3. Modelling 3.1. Population balance 3.2. Breakage of bubbles 3.3. Coalescence of bubbles 3.4. Bubble slip velocity 3.5. Gas–liquid mass transfer 3.6. Stirred tank model 3.7. Discretization 4. Fitting process 5. Results and discussion 5.1. Local bubble size distributions 5.2. The results of fitting 6. Conclusions Acknowledgements References 这是正文标题，供参考 |
4楼2009-06-09 18:57:22
jichongcml
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化学工程科学61 （ 2006 ） 218 - 228 验证泡沫破裂，合并和传质模型的气液分散搅拌船 摘要 泡沫破碎和聚结现象和多元气液传质进行了研究了194德国马克Rushton盘式搅拌船只。当地气泡尺寸分布（ BSD的）测量从空中自来水系统在几个搅拌条件毛细管吸力探头程序（ CSP ）技术。 在警司，比较的数字成像（二）和相位多普勒技术（掌上电脑）技术在14德国马克搅拌船。体积BSDs之间的CSP和直接投资都同意，但一些BSDs显着偏差。的限制，测量技术似乎是主要reason.A多块搅拌槽模型离散人口余额泡沫1 次双膜麦克斯韦-斯特凡多传质气体和液体之间已建立的194德国马克激动船只。该模型认为当地传质条件的船只，是很简单的数学优化模型参数不明。未知参数在机械泡沫破裂和聚钼 对住客拟合测量当地BSDs 。在此之后，一个参数的液膜传质的相关性进行了调整，对吸收和解吸实验的氧气。当地的气液传质计算领域的人口平衡模型。仿真与验证模型显示良好的协议对实验。另一方面，在安装参数偏离理论值，其中强调需要对准确的模型验证experiments.Due其根本性质和审定过程中，安装的模式似乎是有用的工具，设计和规模化的激动气液reactors._ 2005年埃尔塞维尔有限公司All rights reserved 。 关键词： 气泡尺寸分布;传质;混合;多相流;参数辨识;人口平衡。 |
2楼2009-06-09 16:35:01
幽雅百合
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