کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
153128 456519 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the estimation of the regime transition point in bubble columns
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
On the estimation of the regime transition point in bubble columns
چکیده انگلیسی

Using literature data of gas hold-up as a function of the superficial velocity from 16 different sources, a data bank of regime transition points was elaborated. It comprises 83 data related to a total of 20 systems, covering a wide range of physical properties and operating parameters, for both perforated and porous plate spargers. This data bank was employed to critically assess the quality of the predictions of the regime transition point given by available literature correlations. All correlations tested failed to provide a proper representation of the data bank, with rather high mean absolute deviations (always greater than 37%) and, in some cases, even physically inconsistent values were obtained. Thus, new empirical formulas were proposed for estimating the gas superficial velocity at the point of regime transition in bubble columns and the corresponding gas hold-up, whose mean absolute deviations were respectively equal to 17.7 and 21.1%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 140, Issues 1–3, 1 July 2008, Pages 473–482
نویسندگان
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