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Acceleration of Macrosegregation Simulation Based on Lattice Boltzmann Method

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ISIJ Int. 58(1)_ 114-122 (2018).pdf2.12 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/75394

Title: Acceleration of Macrosegregation Simulation Based on Lattice Boltzmann Method
Authors: Ohno, Munekazu Browse this author →KAKEN DB
Sato, Hayato Browse this author
Keywords: macrosegregation
simulation
lattice Boltzmann method
casting
solidification
Issue Date: 15-Jan-2018
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 58
Issue: 1
Start Page: 114
End Page: 122
Publisher DOI: 10.2355/isijinternational.ISIJINT-2017-375
Abstract: Lattice Boltzmann Method (LBM), newly developing technique of computational fluid dynamics, is coupled with solute and energy conservation equations to develop a macrosegregation simulation model (LBM-coupled model) with high computational efficiency. LBM does not require time-consuming calculations for correction of velocity and pressure of fluid in contrast to methods directly solving Navier-Stokes (NS) equation and, therefore, LBM is computationally efficient. In this study, the accuracy of the LBM-coupled model is investigated by calculating the steady state flows and by comparing the results with those of analytical solutions and a conventional model based on the NS equation. The results between them are almost identical with each other and it indicates that the accuracy of the LBM-coupled model is sufficiently high. Moreover, a macrosegregation simulation is carried out for a simple case where the macrosegregation emerges only by natural convection, by means of the LBM-coupled and conventional models. The LBM-coupled model yields almost the same result with the one of NS-based model. Importantly, however, the simulation of LBM-coupled model is about five times faster than the one of NS-based model.
Rights: 著作権は日本鉄鋼協会にある
Type: article
URI: http://hdl.handle.net/2115/75394
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大野 宗一

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