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비평형 1차 외삽 경계조건을 이용한 격자 볼츠만 법의 수치적 안정성 및 정확도에 관한 연구
정해권(Hae-Kwon Jeong),김래성(Las-Sung Kim),이현구(Hyun-Goo Lee),하만영(Man-Yeong Ha) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Non-equilibrium first order extrapolation boundary condition proposed by Guo et al. proposed has a good application for complex geometries, a second order accuracy and a treatment on non-slip wall boundary condition easily. However it has a lack of the numerical stability from high Reynolds number. Guo et al. substituted the density value of adjacent nodes for the density of boundary nodes. This procedure causes the numerical instability on the boundary. In this paper, we derived a procedure of density extrapolation and compared to previous results.