Experimental Modeling of Gas–Solid Heat Transfer in a Pipe with Various Inclination Angles |
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| Authors: | Naser Mokhtarifar Farhad Saffaraval Zohreh Mansoori Alireza Siamie |
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| Affiliation: | 1. Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran;2. Energy Research Center, Amirkabir University of Technology, Tehran, Iran |
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| Abstract: | Gas–solid flow in a pipe with different configurations (vertical, horizontal, and inclined positions) is studied experimentally. Air with temperature around 170°C and sand particles with mean diameter of 253 μm are used as gas and solid mediums, respectively. Effects of different parameters (pipe slope and solid particles feed rate) are studied on heat transfer rate between gas and solid particles. The Nusselt number decreases at lower solids feed rate in a dilute regime of the mixture; however, it increases at higher solids feed rates. Furthermore, results show that a higher Nusselt number takes place at the angles closer to 45 degrees. |
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