NUMERICAL STUDY OF LAMINAR FORCED CONVECTION OF WATER/Al 2 O 3 NANOFLUID IN AN ANNULUS WITH CONSTANT WALL TEMPERATURE

A Kashani, D Jalali-Vahid, S Hussainpour
2013 IIUM Engineering Journal   unpublished
In this paper, laminar forced convection of a nanofluid consisting of water and Al 2 O 3 in a horizontal annulus has been studied numerically. A two-phase mixture model has been used to investigate thermal behaviors of the nanofluid over constant temperature thermal boundary condition and with different volume concentration of nanoparticles. Comparisons with previously published both experimental and analytical works on flow behavior in horizontal annulus show good agreements between the
more » ... as volume fraction is zero. In general, convective heat transfer coefficient increases with nanoparticle concentration. ABSTRAK: Kertaskerja ini mengkaji secara numerik olakan paksa bendalir lamina yang menganduangi air dan Al 2 O 3 didalam anulus mendatar. Model campuran dua fasa digunakan bagi mengkaji tingkah laku haba bendalir nano pada keadaan suhu malar dengan kepekatan nanopartikel berbeza. Perbandingan dengan karya eksperimen dan analitikal yang telah diterbitkan menunjukkan bahawa kelakuan aliran didalm anulus mendatar adalah baik apabila pecahan isipadu adalah sifar. Pada amnya, pekali pemindahan haba olakan meningkat dengan kepekatan nanopartikel.
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