نوع مقاله: مقاله پژوهشی
نویسندگان
1 پژوهشگاه علوم و فنون هسته‌ای، تهران-ایران
2 انرژی اتمی ایران/ پژوهشگاه علوم و فنون هسته ای
3 موسسه تحقیقات هسته‌ای، میوونی-رومانی
4 پژوهشگاه علوم و فنون هسته ای، تهران، ایران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
The study of the process of absorption and evaporation of fluids in porous media is of particular importance in sciences such as geology, civil engineering, environment, etc. One of the most precise methods for investigation of mentioned processes, is neutron radiography. Due to the high cross-section of thermal neutrons with hydrogen, precise investigation of absorption and evaporation of fluids containing hydrogen, such as water, oil, etc., is possible. In this study, using real time neutron radiography technique, water vaporization from a porous building sample at 10 °C in the laboratory was investigated. For this purpose, a building brick was immersed into water for 24 hours and then was placed in front of the neutron beam. During 145 minutes reactor operation, 30 images were recorded with a 5 minutes interval from the wet sample. The obtained images showed that using the utilized technique, the distribution variations and volumetric water content inside the sample are well visible. Also, the results indicated that the volumetric water content in the sample was evaporated with a rate of 3.94 × 10-4 percent per second in the laboratory.
کلیدواژه‌ها [English]
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