International Science Community Association Research Journal of Recent Sciences 2277 - 2502 1 1 2012 January 2 Hexagonal Geometrical Inclusion to Estimate Effective Thermal Conductivity (ETC) of Porous System and Suspension system Including the Effect of Natural Convection 33 39 EN Gwal A.K. 1 Space Science Laboratory, Department of Physics Barkatullah University Bhopal-462026, INDIA Jain SantoshKumar 2 Panda Gopal 3 Gujar Y.S. 4 Raghuwanshi S. 5 S.K. Vijay 6 Bora Abhijit 1 Tezpur University, Napaam, Sonitpur district, Assam, INDIA Parikh AnkitaN. 1 Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Varodara.390 002, Gujarat, INDIA Mankodi P.C. 2 SenthilKumar A.P. 1 Department of Mechanical Engineering PSG College of Technology, Coimbatore, INDIA Karthikeyan P. 2 Department of Automobile Engineering PSG College of Technology, Coimbatore, INDIA V. PrabhuRaja 3 M. Ramu 4 Somasundharam S. 5 Vasudevan V. 6 Selvakumar B. 1 Department of Mechanical Engineering PSG College of Technology, Coimbatore, INDIA V. PrabhuRaja 2 Department of Automobile Engineering PSG College of Technology, Coimbatore, INDIA R. NandhaKumar 3 SenthilKumar A.P. 4 M.S. Vignesh 5 G.R. VivekSharma 6 Karthikeyan P. 7 > Research Paper 2011 10 20 2012 January 2 In this present work, a numerical model of hexagonal geometrical inclusion is developed to estimate the Effective Thermal Conductivity (ETC) of the two-phase materials taking the natural convection into account. A 2-D Constant Cross Section of unit cell model is analyzed with 1-D and 2-D heat transfer using Computational Fluid Dynamics (CFD) software. Numerical analysis has been carried out by considering primary effects (Conductivity ratio, concentration) and secondary effects (natural convection) to estimate ETC of two phase materials. The developed hexagonal geometrical model also shows excellent agreement with the available experimental and analytical data. Copyright@ International Science Community Association