کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
670472 | 1459014 | 2015 | 46 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rayleigh-Benard convection in Herschel-Bulkley fluid
ترجمه فارسی عنوان
کنجکاوی ریلی-بنارد در مایع هرشل-بولکلی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The intent of the present work is to investigate Rayleigh-Benard convection in a viscoplastic fluid prepared from Carbopol (Ultrez 20) gel. Thermorheological characterization of the test fluid has been presented and rheological properties are represented by Herschel-Bulkley model. Further, temperature dependency of rheological parameters is described by Arrhenius model. Rayleigh-Benard convection phenomenon in a square enclosure filled with viscoplastic fluid has been investigated numerically as well as experimentally. The proposed computational model uses the temperature-dependent rheological properties. Results of the proposed model show a fair agreement with our own experimental data. Use of temperature-dependent rheological properties has improved the predictions significantly. With the increase in yield stress, there is a phenomenal change in diminishing convective flow patterns. Critical Rayleigh number representing the onset of convection has been determined for different concentrations of the gel. Nusselt number correlations as a function of Rayleigh number and yield number have been developed for two different values of Prandtl number.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 226, December 2015, Pages 32-45
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 226, December 2015, Pages 32-45
نویسندگان
M.A. Hassan, Manabendra Pathak, Mohd. Kaleem Khan,