Open AccessUNSTEADY LAMINAR CONVECTION FLOW OVER PERIODIC GROOVES BY USING SIO2-WATER NANOFLUID
Author(s) -
Amirhossein Heshmati,
Mohammad Parsazadeh,
Farshid Fathinia
Publication year - 2013
Publication title -
international journal of applied research in mechanical engineering
Language(s) - English
Resource type - Journals
ISSN - 2231-5950
DOI - 10.47893/ijarme.2013.1079
Subject(s) - laminar flow , nanofluid , mechanics , materials science , heat transfer , reynolds number , volume fraction , heat flux , forced convection , finite volume method , heat transfer enhancement , thermodynamics , combined forced and natural convection , flow (mathematics) , heat transfer coefficient , natural convection , composite material , physics , turbulence
Unsteady laminar forced convection flow in a 2-dimensional channel over periodic grooves is numerically investigated. Finite volume method is used and the equations were discretized by second order upwind method. The ribheight to channel-height ratio (B/H) is 2. The downstream wall is heated by a uniform heat flux while the upstream wall is insulated. Quasi steady point was obtained at τ=10. The heat transfer is analyzed with different nanoparticles volume fraction and diameter of 0-4% and 20nm-50nm for SiO2 respectively at Reynolds number of 400 and τ=10. Water is used as a base fluid of nanoparticles. The results revealed 124% heat transfer enhancement compared to the water in a grooved channel by using SiO2 nanoparticle with volume fraction and nanoparticle diameter of 4% and 20nm respectively.