Talaghat - Ph.D student – Associate professor Department of oil, gas and chemical engineering Shiraz university – Shiraz ,Iran
jahanmiri - Ph.D student – Associate professor Department of oil, gas and chemical engineering Shiraz university – Shiraz ,Iran

This paper presents a study on estimation of heat transfer coefficient and thermal diffusivity parameters by use of analytical solutions and experimental data for regular geometries (infinite slab, infinite cylinder and sphere). Analytical solutions have a broad use in experimentally determining these parameters. Here, the method of Finite Integral Transform (FIT) was used for solutions of governing differential equations. The temperature change at centerline location of cylindrical objects( Aluminum & Brass) were recorded to determine both the thermal diffusivity in a highly agitated water medium, and heat transfer coefficient in air and water mediums . Then, with the known slope of the temperature ratio vs. time curve and radius of the cylindrical material, thermal diffusivity value or heat transfer coefficient may be determined. For all experiments , excellent agreement was obtained between the experimental results and actual data

Analytical solutions; finite integral transform ,approximation method, thermal diffusivity, heat transfer coefficient