Heating a cold semi-annulus wall by MHD natural convetion with nanofluid
Document Type
Article
Publication Date
12-1-2021
Abstract
In the current research, the natural convection of water-Al2O3 nanofluid has been simulated inside a cold semi-annulus chamber with a hot block at the its bottom. Also, an oblique magnetic field (MHD) has been implemented to improve and control the flow. The unstructured triangular mesh and FVM with SIMPLE algorithm have been employed for discretization and coupling of pressure and velocity equations. In this simulation, the parameters of Hartmann, Rayleigh numbers and volume fraction of nanoparticles have been investigated on temperature contours, flow pattern, and hot wall Nusselt number. The observations show that, increasing the volume fraction increases the Nusselt number at low Rayleigh numbers. Moreover, the Nusselt number is inversely related to the Hartmann number for high Rayleigh numbers.
Keywords
Natural convection, MHD, Cold semi-annulus, Hot block, CFD
Divisions
sch_ecs
Funders
Deanship of Scientific Research at King Khalid University [Grant No: RGP.1/260/42],Universiti Malaya [Grant No: GPF054A-2020]
Publication Title
Case Studies in Thermal Engineering
Volume
28
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS