نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری آبیاری و زهکشی دانشگاه تبریز
2 استاد گروه مهندسی آب، دانشگاه تبریز
3 استادیار گروه مهندسی آب، دانشگاه تبریز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Science of heat transfer is one of the most and widely used engineering sciences. porous media Because of their structure provides large heat transfer surface in a given volume Therefore study heat transfer in porous media soil have been considered because of the importance of the underlying soil and bsorb water and roots in recent years. In this study is surveyed coupled transfer heat and water in porous media soil that heat transfer by convection using Thermography (IRT) and is laboratory conditions. Experiment is conducted in the physical model made in the ofdepartment Engineering and Technology University of City padva in Italy (for the sabbatical). Numerical analysis based on the finite difference and equation heat transfer in porous media and Using Comsol model. measurement Temperature Done in porous media saturated sand using thermocouples and at designated points and at coupling of different temperature and water flow rate (q1, q2, T1, T2, T3, T4, T5) Compare experimental and numerical results show that the Comsol model simulates with great accuracy coupled transfer heat and water Also surface heat diffusion in porous media soil. In Coupled transfer heat and water in porous media at flow further, is spent less time to achieve steady state. Experimental results showed that in coupled transfer heat and water, longitudinal profiles heat will be increased With higher temperatures in porous media. Higher the value, the greater the flow rate of water will be less diffusion longitudinal profiles heat(diffusion longitudinal profiles heat coupled q2T4 shown greater than coupled q1T4). As the temperature increases development time and achieve a steady state temperature profiles increases in porous media. With the constant flow and rise of temperature decline time development to reach steady state temperature profiles in the length and longitudinal distances determined porous Media.
کلیدواژهها [English]
)