CFD Modeling of Flow,Temperature, and Concentration Fields in a Pilot-Scale Rotary Hearth Furnace |
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Authors: | Ying Liu Fu-Yong Su Zhi Wen Zhi Li Hai-Quan Yong Xiao-Hong Feng |
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Affiliation: | 1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, P.R. China 2. CISDI Industrial Furnace Co. Ltd., Chongqing, 400013, P.R. China
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Abstract: | A three-dimensional mathematical model for simulation of flow, temperature, and concentration fields in a pilot-scale rotary hearth furnace (RHF) has been developed using a commercial computational fluid dynamics software, FLUENT. The layer of composite pellets under the hearth is assumed to be a porous media layer with CO source and energy sink calculated by an independent mathematical model. User-defined functions are developed and linked to FLUENT to process the reduction process of the layer of composite pellets. The standard k–ε turbulence model in combination with standard wall functions is used for modeling of gas flow. Turbulence-chemistry interaction is taken into account through the eddy-dissipation model. The discrete ordinates model is used for modeling of radiative heat transfer. A comparison is made between the predictions of the present model and the data from a test of the pilot-scale RHF, and a reasonable agreement is found. Finally, flow field, temperature, and CO concentration fields in the furnace are investigated by the model. |
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