每年出版 6 期
ISSN 打印: 1940-2503
ISSN 在线: 1940-2554
IF:
1.5
5-Year IF:
1
Immediacy Index:
0.3
Eigenfactor:
0.00017
JCI:
0.28
SJR:
0.279
SNIP:
0.544
CiteScore™::
2.5
H-Index:
22
Indexed in
GENERAL MASS TRANSFER MODELING FOR MULTIPHASE FLOWS: VOF METHOD WITH PLIC-1 AND PLIC-2 SCHEMES
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摘要
A general mass transfer model based on a first-order approximation of Fick's law at the gas-liquid interface is implemented in the multiphase volume-of-fluid model of the commercial computational fluid dynamics code Fluent 19.2. Two methods are employed to discretize the concentration gradient. The first, PLIC-1, assumes the characteristic length to be the normal distance from the interface to the center of gravity to the truncated cell. The second, PLIC-2, simply assumes the characteristic length to be the cubic root of the truncated cell volume. Both methods are tested against novel analytical solutions on different cell topologies. The results using PLIC-1 are very satisfactory for any type of grid. The PLIC-2 method shows errors up to 10% on a Cartesian grid and below 1% on unstructured meshes. In both cases, the PLIC-1 method shows an error three times smaller than that of PLIC-2. Hence, PLIC-1 is the recommended method when a high accuracy is required on any type of convex grid.
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