Prediction of micro-bubble dissolution characteristics in water and seawater
Prediction of micro-bubble dissolution characteristics in water and seawater
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DOI：
10.1016/j.expthermflusci.2009.03.004
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发表时间：
2009-07-01
影响因子：
3.2
通讯作者：
Noguchi, Masanori
中科院分区：
文献类型：
--
作者：
Kawahara, Akimaro;Sadatomi, Michio;Noguchi, Masanori
本文研究了用球形体sadatomi型微泡发生器（2003）在流动液管内产生微泡时，对水和海水中微泡溶解特性的预测。在实验中，为了了解盐度对特性的影响，分别以1 wt%和3 wt%不同盐浓度的自来水和人工海水作为试验液。测量的参数为气泡的Sauter平均直径d（BS）、气泡的孔隙率alpha、气泡的上升速度u(G)、界面面积浓度a、体积传质系数K(L)a和液侧传质系数K(L)。在分析中，为了预测alpha、KLa和KL，对文献中的一些相关性进行了与本数据的检验。此外，为了提高可预测性，在现有数据的基础上建立了新的相关性。新相关性对KLa的预测与Nishino et al. [T。Nishino， K. Terasaka， M. Ishida，几种微泡发生器在气体吸收器中的应用，《日本多相流学会年会论文集》，2006,pp. 276-277（日文）。李洪杰，微气泡气浮技术在水处理中的应用，化学工程学报，39 (2006)896-903；李鹏，崔海峰，一种新型微气泡气激接触器的臭氧转移，化学工程学报，39(2006)1213-1220]。(C) 2009爱思唯尔公司版权所有。
This paper is concerned with the prediction of micro-bubble dissolution characteristics in water and sea-water when microbubbles are generated by a Sadatomi-type micro-bubble generator (2003) with a spherical body in a flowing liquid tube. In the experiments, in order to know the effects of the salinity on the characteristics, tap water and an artificial seawater with different salt concentrations of 1 and 3 wt% were used as the test liquids. Parameters measured were the Sauter mean diameter of bubbles, d(BS), the void fraction, alpha, the rising velocity of bubbles, u(G), the interfacial area concentration, a, the volumetric mass transfer coefficient, K(L)a, and the liquid-side mass transfer coefficient, K(L). In the analysis, for predicting alpha, KLa and KL, some correlations in the literatures were tested against the present data. Furthermore, in order to improve the predictability, new correlations were developed based on the present data. The prediction of KLa with the new correlation agreed well with Nishino et al.'s [T. Nishino, K. Terasaka, M. Ishida, Application for several micro-bubble generators for gas absorber, in: Proceedings of the Annual Meeting of the Japanese Society for Multiphase Flow, 2006, pp. 276-277 (in Japanese)] and Li and Tsuge's [P. Li, H. Tsuge, Water treatment by induced air flotation using microbubbles, journal of Chemical Engineering of Japan 39 (2006) 896-903; P. Li, H. Tsuge, Ozone transfer in a new gas-induced contactor with microbubbles, journal of Chemical Engineering of Japan 39 (2006) 1213-1220] data for different aeration systems using several different micro-bubble generators. (C) 2009 Elsevier Inc. All rights reserved.