Abstract
A new optimality criterion algorithm is presented for producing modified shape designs for fluid flow inside channels. To compute the fluid motion in a channel, the lattice Boltzmann method (LBM) was used based on D2Q9 and D3Q15 lattice spaces associated with the Bhatnagar-Gross-Krook (BGK) collision term. An experiential optimality method to design channels with the lowest pressure drop along the passage is introduced. The positions of solid cells and fluid cells are exchanged based on the strain rate tensor at the solid-fluid interface. To obtain the optimized shape, the cells are changed until the optimality condition is obtained with the restriction of constant fluid volume. Examples are presented to validate the algorithm, including an elbow tube as well as symmetrical and nonsymmetrical Tjunction channels. The validation exercises demonstrate that the algorithm is suitable for optimal channel design.
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Jungmin Park is a researcher in Korea Atomic Energy Research Institute. His main research interests are application of computational fluid dynamics in energy conversion system and organic Rankine cycle system. He is currently working on designing decay heat removal system.
Kyung Chun Kim is a Professor at the School of Mechanical Engineering of Pusan National University in Korea. He obtained his Ph.D. from the Korea Advanced Institute of Science and Technology (KAIST), Korea, in 1987. He was selected as a Member of the National Academy of Engineering of Korea in 2004. His research interests include flow measurements based on PIV/LIF, POCT development, wind turbines, and organic Rankine cycle system.
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Park, J., Safdari, A. & Kim, K.C. Shape optimization of flow channels based on lattice Boltzmann method. J Mech Sci Technol 32, 2619–2627 (2018). https://doi.org/10.1007/s12206-018-0519-8
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DOI: https://doi.org/10.1007/s12206-018-0519-8