کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6893638 1445566 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Convection in a magnetic nanofluid saturating a porous medium under the influence of a variable gravity field
ترجمه فارسی عنوان
جابجایی در یک نانوسیم مغناطیسی با اشباع محیط متخلخل تحت تاثیر یک میدان گرانشی متغیر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر علوم کامپیوتر (عمومی)
چکیده انگلیسی
This paper presents a numerical investigation of the onset of instability in a thin magnetic nanofluid (or ferrofluid) layer saturating a porous medium, subject to a gravity field which varies with distance across the layer. A model that accounts for the effect of Brownian diffusion, thermophoresis, magnetophoresis and Darcy's law is considered. We employed the Chebyshev pseudospectral method and QZ algorithm to obtain the numerical solutions. The impact of important parameters, which affect the instability of the system has been analyzed at the onset of convection for water-based and ester-based magnetic nanofluids. The results indicate that increase in the width of magnetic nanofluid layer (d), Langevin parameter (αL), gravity coefficient (δ), permeability parameter (K); and decrease in the Lewis number (Le), concentration Rayleigh number (Rn), modified diffusivity ratio (NA), nonlinearity of fluid magnetization (M3) is to delay the onset of convection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Science and Technology, an International Journal - Volume 21, Issue 3, June 2018, Pages 439-450
نویسندگان
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