کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662205 1458134 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heat transfer in evaporating black liquor falling film
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Heat transfer in evaporating black liquor falling film
چکیده انگلیسی
Black liquor is a fluid with high viscosity, implying high Pr numbers. Most of the previously developed correlations for falling film evaporation heat transfer were developed for fluids with relatively low Pr numbers, and therefore are not valid for most black liquor evaporation conditions. Experimental heat transfer data from black liquor evaporation are presented here. They show that the Nu number, as expected, increases in the turbulent region. However, at a specific Re number for each Pr number level, the Nu number ceases to increase with increasing Re number. A new correlation, taking this observation into account, has been developed on the basis of experimental data in the region of 4.7 < Pr < 170 and 47 < Re < 6740, and is presented in this paper. A dry solid content dependence is included in the new correlation and improves its predictions for black liquor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 52, Issues 11–12, May 2009, Pages 2759-2768
نویسندگان
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