کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
653060 | 1457491 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An experimental study on heat transfer and pressure drop of MWCNT-water nano-fluid inside horizontal coiled wire inserted tube
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An experimental study on heat transfer and pressure drop of MWCNT-water nano-fluid inside horizontal coiled wire inserted tube An experimental study on heat transfer and pressure drop of MWCNT-water nano-fluid inside horizontal coiled wire inserted tube](/preview/png/653060.png)
چکیده انگلیسی
An experimental investigation has been carried out to study the heat transfer and pressure drop characteristics of Nanofluid turbulent flow inside horizontal copper tube with different wire coil inserts under constant heat flux. The plain and coil inserted tubes were used as the test section's geometries and were heated by an electrical coil heater to produce constant heat fluxes. Nanofluids with different particle weight concentrations of 0.05%, 0.1%, and 0.2% were prepared by dispersion of functionalized multi-walled carbon nanotubes (MWCNTs) in distilled water and stabilized by means of an ultrasonic device. The effect of different parameters such as Reynolds number, nano-particle concentration, wire diameter and coil pitch on heat transfer coefficient and pressure drop are studied. Observations clearly show that for a specific nanoparticle concentration, increase in both heat transfer and pressure drop is obtained by inserting coil wires. In average, 85% increase in heat transfer coefficient and 475% penalty in pressure drop was observed at the highest Reynolds number inside the wire coil inserted tube with the highest wire diameter. Finally, two new correlations are introduced using the results of the experiments for predicting the Nusselt number and friction factor of the nanofluid flow inside coiled wires inserted tubes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 63, April 2015, Pages 62-72
Journal: International Communications in Heat and Mass Transfer - Volume 63, April 2015, Pages 62-72
نویسندگان
M.A. Akhavan-Behabadi, Mohamad Shahidi, M.R. Aligoodarz,