Journal of Korea Multimedia Society (한국멀티미디어학회논문지)

Korea Multimedia Society (한국멀티미디어학회)
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A Physical-based Particle Method for Small Scale Feature in Multi-phase Fluid Simulation

다상 유체 시뮬레이션에서 격자 크기 이하의 미세한 특징 표현을 위한 물리기반 입자 기법

  • Published : 2009.03.30
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Abstract

This paper presents a multi-phase fluid simulation that realistically represents small scale details. We achieve this by creating escaped particles based on physical methods. Escaped particles are the remained particles after correcting levelset. Generation of escaped particles in this paper differs from previous works; this fluid simulation is extended by adding lift force and drag force to positive escaped particles. And negative escaped particles represent droplet or splash effect; when they are merged into the negative levelset value, they affect the nodes' velocity (two-way coupling). This simulation that uses positive and negative escaped particles deals with detailed fluid motions dynamically in small scale.

본 논문에서는 물리기반 다상 유체 시뮬레이션의 정확성과 격자 크기 이하의 미세하고 사실적으로 아름다운 유체를 표현하기 위하여 이탈입자에 물리 기법을 추가하였다. 이탈 입자는 입자등위집합 기법에서 표시 입자들이 등위집합을 보정해 주고 남아 있는 입자들을 말하며, 본 논문은 이탈입자가 생성되는 방법을 기존과 다르게 하고, 미세한 공기방울을 표현한 양수의 이탈입자에서 견인력과 양력을 사용하여 유체 시뮬레이션을 확장하였다. 음수의 이탈입자는 또한 물방울과 스플래시 효과를 표현하였고, 등위집합의 음의 값과 합해지게 되면 그 노드의 속도에 영향을 주도록 설계하였다. 이렇게 양수의 이탈입자와 음수의 이탈입자를 사용하는 것은 유체 시뮬레이션에서 격자크기 이하의 상세함을 표현할 수 있고 역동적인 유체를 시뮬레이션 할 수 있게 한다.

Keywords

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