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| Analysis of gas-liquid two-phase flow in oxidation ditch with fine bubbles based on PBM model |
| YANG Yahong, LIU Lingang*, ZHAO Yang, ZHU Tianxu |
| College of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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Abstract It is difficult to model fine bubble aeration in multiphase flow simulations for oxidation ditch with fine bubbles. In this work,the population balance model(PBM)was used by employing FLUENT and the model feasibility in fine bubble aeration was validated. Then, the gas-liquid flow in an oxidation ditch with fine bubbles was studied in Fluent. The results show that the velocity based on PBM model agrees better with the experimental data than the velocity based on the traditional model, i.e. the average error of the former is less than the latter. Thus, the new method coupled with PBM model can reduce the error caused by simplified aeration models.
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Received: 20 October 2016
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