Unsteady natural convection in micropolar nanofluids
نویسندگان
چکیده
منابع مشابه
Heterogeneous nanofluids: natural convection heat transfer enhancement
Convective heat transfer using different nanofluid types is investigated. The domain is differentially heated and nanofluids are treated as heterogeneous mixtures with weak solutal diffusivity and possible Soret separation. Owing to the pronounced Soret effect of these materials in combination with a considerable solutal expansion, the resulting solutal buoyancy forces could be significant and ...
متن کاملUnsteady Free Convection and Mass Transfer Flow of Micropolar Fluid Embedded in a Porous Media
This paper deals with the unsteady free convection and mass transfer flow of micropolar fluid embedded in a porous media. The governing equations involve the fluid and micropolar velocities respectively, temperature and concentration fields. The effects of material parameters on the velocities, temperature and concentration are discussed. Perturbation method is used to obtain the solutions to t...
متن کاملFinite Element Solution of Unsteady Mixed Convection Flow of Micropolar Fluid over a Porous Shrinking Sheet
The objective of this investigation is to analyze the effect of unsteadiness on the mixed convection boundary layer flow of micropolar fluid over a permeable shrinking sheet in the presence of viscous dissipation. At the sheet a variable distribution of suction is assumed. The unsteadiness in the flow and temperature fields is caused by the time dependence of the shrinking velocity and surface ...
متن کاملLattice Boltzmann Simulation of Nanofluids Natural Convection Heat Transfer in Concentric Annulus (TECHNICAL NOTE)
Abstract This study is applied Lattice Boltzmann Method to investigate the natural convection flow utilizing nanofluids in a concentric annulus. A numerical strategy presents for dealing with curved boundaries of second order accuracy for both velocity and temperature fields. The fluid between the cylinders is a water-based nanofluid containing different types of nanoparticles: copper (Cu), a...
متن کاملOn the Teaching of the Lumped Model for Unsteady Heat Conduction: Natural Convection Versus Forced Convection
Within the lumped model platform for unsteady heat conduction, the Biot number criterion between a solid body and a surrounding fluid requires that Bi = S V k h s < 0.1. Although not clearly stated, this holds true mostly for forced convection where the mean convective coefficient h is affected by the impressed fluid velocity. Conversely, when heat is exchanged by natural convection...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Archives of Thermodynamics
سال: 2014
ISSN: 2083-6023
DOI: 10.2478/aoter-2014-0027