Turbulent forced convection flow in a 2-dimensional channel over periodic grooves is numerically investigated. Finite volume method is used to study the effect of turbulence model. The range of Reynolds number varied from 10000 to 30000 for the ribheight to channel-height ratio (B\/H) of 2. The downstream wall is heated by a uniform heat flux while the upstream wall is insulated. The investigation is analyzed with different types of nanoparticles such as SiO2, Al2O3, and ZnO, with water as a base fluid are used. The volume fraction is varied from 1% to 4% and the nanoparticle diameter is utilized between 20nm to 50nm. The results revealed 114% 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.<\/p>\r\n","references":"[1] Ankit Kumar, A.K.D., Effect of a circular cylinder on separated forced\r\nconvection at a backward-facing step. International Journal of Thermal\r\nSciences,Vol. 52, p. 9, 2012.\r\n[2] S.Eiamsa-ard ,P.Promvonge, Numerical study on heat transfer of\r\nturbulent channel flow over periodic grooves. International\r\nCommunications in Heat and Mass Transfer, 35, pp. 844-852, 2008.\r\n[3] T.Adachia, Y.Tashiroa, H.Arimab, Y.Ikegami(2009), Pressure drop\r\ncharacteristics of flow in a symmetric channel with periodically\r\nexpanded grooves, Chemical Engineering Science, vol.64, pp. 593\u00d4\u00c7\u00f6\r\n597, 2009.\r\n[4] T.Adachi, H.Uehara , Correlation between heat transfer and pressure\r\ndrop in channels with periodically grooved parts, International Journal\r\nof Heat and Mass Transfer, vol. 44, 2001.\r\n[5] S.Eiamsa-ard, P.Promvonge, Thermal characteristics of turbulent ribgrooved\r\nchannel flows, International Communications in Heat and Mass\r\nTransfer, vol. 36, pp. 705-711, 2009.\r\n[6] J R. Kamali ,A.R. Binesh, The importance of rib shape effects on the\r\nlocal heat transfer and flow friction characteristics of square ducts with\r\nribbed internal surfaces, International Communications in Heat and Mass\r\nTransfer, vol. 35, pp. 1032-1040, 2008.\r\n[7] H.Shokouhmand ,K.Vahidkhah, M.A.Esmaeili, Numerical Analysis of\r\nAir Flow and Conjugated Heat Transfer in Internally Grooved Parallel-\r\nPlate Channels, World Academy of Science, Engineering and\r\nTechnology, vol. 73, 2011.\r\n[8] M.Greiner, F,Fischer,M.Tufo, Two-Dimensional Simulations of\r\nEnhanced Heat Transfer in an Intermittently Grooved Channel, Journal\r\nof Heat Transfer, Vol. 124, June 2002.\r\n[9] M C. Herman, E. Kang , Comparative evaluation of three heat transfer\r\nenhancement strategies in a grooved channel, Heat and Mass Transfer,\r\nvol. 37 , pp.563-575, 2001.\r\n[10] L.Ortiz, A. Hernandez-Guerrero, C. Rubio-Arana, R. Romero-Mendez,\r\nHeat transfer enhancement in a horizontal channel by the addition of\r\ncurved deflectors, International Journal of Heat and Mass Transfer, vol.\r\n51, pp. 3972-3984, 2008.\r\n[11] Oronzio Manca, S.N., Daniele Ricci, A numerical study of nanofluid\r\nforced convection in ribbed channels. Applied Thermal Engineering,vol.\r\n37, pp. 280-292, 2012.\r\n[12] A.A. Al-aswadi, H.A.M., N.H. Shuaib, Antonio Campo, Laminar forced\r\nconvection flow over a backward facing step using nanofluids.\r\nInternational Communications in Heat and Mass Transfer, vol 37, 2010.\r\n[13] S. A. Sh. Kherbeet , H.A.M., B.H. Salman, The effect of nanofluids flow\r\non mixed convection heat transfer over microscale backward-facing step.\r\nInternational Journal of Heat and Mass Transfer, 2012.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 72, 2012"}