粒子間力を用いた表面張力モデルの検討(混相(1),一般講演)

概要

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We developed a new surface tension model for particle method by using inter-particle force; the surface tension was defined as pressure gradient at gas-liquid interfaces, and the pressure was calculated using the inter-particle force. The inter-particle force was given by derivation of potential energy in space. The developed surface tension model was verified using simple benchmark tests: pressure in a circle-droplet, given by Young-Laplace equation, and oscillation period of a square liquid-droplet, given by Lamb's theory. The predicted pressure in a circle-droplet agreed well with that given by the Young-Laplace equation with error of less than 7 percent. Furthermore, the predicted oscillation period of a square droplet was 0.45s compared with that of 0.46s given by the Lamb's theory. It was found that the new surface tension model was useful for simulation of gas-liquid interfaces.
2010-09-09