| Citation: | MENG Fanchao, DONG Sujun, JIANG Hongsheng, et al. A fast algorithm for long-term fluid-solid conjugate heat transfer process[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(6): 1224-1230. doi: 10.13700/j.bh.1001-5965.2016.0447(in Chinese)
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Concerning the specific demands for solving problems of the long-term conjugate heat transfer (CHT) problem at the kilosecond level, a new loosely coupled algorithm of the global tightly transient coupled heat transfer based on the quasi-steady flow field is put forward. The flow field is updated alone by steady algorithm and the transient temperature field of the fluid and solid regions are solved by transient heat transfer algorithm alternately. Compared to the traditional loosely coupled algorithm, the computational efficiency is further improved with the greatly reduced update frequency of the flow field. Taking a tube heated by inner forced air flow heating process for 300 s as an example, the results by Fluent software show that, compared to the tightly transient coupled calculation, the maximum wall temperature rise deviation is 5% while the computing time is reduced to 14.8%.
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