We developed a method of hybrid particle/cubic interpolated propagation (CIP) to predict the motion of micro- and macrofree surfaces within gas-liquid flows. Microfree surfaces (smaller than the grid sizes) were simulated with the particle method, and macrofree surfaces (larger than the grid sizes) were simulated with the grid method (CIP is a kind of grid method). With the hybrid, velocities given by the advection part of the particle method were combined with those given by the advection part of CIP. Furthermore, the particles used with the particle method were assigned near the macrofree surfaces by using the volume fraction of liquid that was calculated with CIP. The method we developed was used to predict the collapse of a liquid column. Namely, it was simultaneously able to predict both large deformation in the liquid column and its fragmentation, and the predicted configurations for the liquid column agreed well with the experimentally measured ones. It was also used to predict the behavior of liquid films at the outlet of a fuel injector used for automobile engines. The particle method in the simulation was mainly used for liquid films in the air region and the grid method was used for the other regions to shorten the computational time. The predicted profile of the liquid film was very sharp in the air region where the liquid film became thinner than the grid sizes; there was no loss of liquid film with numerical diffusion.
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e-mail: eishii.ishii.pk@hitachi.com
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September 2006
Technical Papers
Hybrid Particle/Grid Method for Predicting Motion of Micro- and Macrofree Surfaces
Eiji Ishii,
Eiji Ishii
Mechanical Engineering Research Laboratory,
e-mail: eishii.ishii.pk@hitachi.com
Hitachi, Ltd.
, 832-2, Horiguchi, Hitachinaka, Ibaraki 312-0034, Japan
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Toru Ishikawa,
Toru Ishikawa
Automotive Systems,
Hitachi, Ltd.
, 2520 Takaba, Hitachinaka, Ibaraki 312-8503, Japan
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Yoshiyuki Tanabe
Yoshiyuki Tanabe
Automotive Systems,
Hitachi, Ltd.
, 2520 Takaba, Hitachinaka, Ibaraki 312-8503, Japan
Search for other works by this author on:
Eiji Ishii
Mechanical Engineering Research Laboratory,
Hitachi, Ltd.
, 832-2, Horiguchi, Hitachinaka, Ibaraki 312-0034, Japane-mail: eishii.ishii.pk@hitachi.com
Toru Ishikawa
Automotive Systems,
Hitachi, Ltd.
, 2520 Takaba, Hitachinaka, Ibaraki 312-8503, Japan
Yoshiyuki Tanabe
Automotive Systems,
Hitachi, Ltd.
, 2520 Takaba, Hitachinaka, Ibaraki 312-8503, JapanJ. Fluids Eng. Sep 2006, 128(5): 921-930 (10 pages)
Published Online: February 28, 2006
Article history
Received:
December 19, 2004
Revised:
February 28, 2006
Citation
Ishii, E., Ishikawa, T., and Tanabe, Y. (February 28, 2006). "Hybrid Particle/Grid Method for Predicting Motion of Micro- and Macrofree Surfaces." ASME. J. Fluids Eng. September 2006; 128(5): 921–930. https://doi.org/10.1115/1.2234784
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