کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657648 1458072 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study of a universal CHF enhancement mechanism in nanofluids using hydrodynamic instability
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Experimental study of a universal CHF enhancement mechanism in nanofluids using hydrodynamic instability
چکیده انگلیسی

Pool boiling tests were designed and performed to confirm the relation between the enhancement of critical heat flux (CHF) in nanofluids and the development of a hydrodynamic instability on the test heater surface from the deposition of nanoparticles during boiling. These pool boiling experiments were carried out under atmospheric pressure using a 0.49 mm diameter cylindrical Ni–Cr wire as a heating element with ZnO, SiO2, SiC, Al2O3, graphene oxide and CuO nanoparticles at 0.01% volume concentration. The test fluids are distilled water and R-123. The CHF value for each nanofluid is obtained and compared with the measured Rayleigh–Taylor wavelength. Higher CHF results have shorter Rayleigh–Taylor wavelengths in all cases. We propose a modified theoretical model for hydrodynamic instability that incorporates these effects and fits experimental results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 70, March 2014, Pages 844–850
نویسندگان
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