TY - JOUR
T1 - A modified boundary condition of velocity for continuity equation with non-uniform density distribution at outlet boundary plane
AU - Yokoi, Satoki
AU - Matsukawa, Yoshiya
AU - Saito, Yasuhiro
AU - Matsushita, Yohsuke
AU - Aoki, Hideyuki
AU - Malalasekera, Weeratunge
N1 - Funding Information:
This work was supported by JSPS KAKENHI grant number 15J04680, and part of this work was carried out under the Leading Young Researcher Overseas Visit Program of Tohoku University.
Publisher Copyright:
Copyright © 2018 JTohuer nSoalc oieft Cy hoef mChiceaml Eicnagli Ennegerininege rosf, Japan.
PY - 2018/8/20
Y1 - 2018/8/20
N2 - Boundary conditions in computational fluid dynamics significantly affect the prediction of flow fleld. However, the outlet boundary conditions for the continuity equation have been rarely investigated. In addition, the velocities at the outlet boundary might not be accurately predicted with the conventional outlet boundary conditions when a flow that has non-uniform density distribution on the outlet boundary is simulated. In the present study, we modified a boundary condition for the continuity equation in consideration of the non-uniform density distribution on the outlet boundary plane, comparing the numerical results of combustion between the conventional and modified boundary conditions. As a result, the proposed boundary condition can resist the generation of an unrealistic temperature field better than the conventional methods.
AB - Boundary conditions in computational fluid dynamics significantly affect the prediction of flow fleld. However, the outlet boundary conditions for the continuity equation have been rarely investigated. In addition, the velocities at the outlet boundary might not be accurately predicted with the conventional outlet boundary conditions when a flow that has non-uniform density distribution on the outlet boundary is simulated. In the present study, we modified a boundary condition for the continuity equation in consideration of the non-uniform density distribution on the outlet boundary plane, comparing the numerical results of combustion between the conventional and modified boundary conditions. As a result, the proposed boundary condition can resist the generation of an unrealistic temperature field better than the conventional methods.
KW - Collocated Grid
KW - Finite Volume Method
KW - Outflow Boundary Condition
KW - Unsteady State
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U2 - 10.1252/jcej.17we178
DO - 10.1252/jcej.17we178
M3 - Article
AN - SCOPUS:85052067238
SN - 0021-9592
VL - 51
SP - 641
EP - 645
JO - Journal of Chemical Engineering of Japan
JF - Journal of Chemical Engineering of Japan
IS - 8
ER -