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Reduction of Grid Size Dependency in DME Spray Modeling with Gas-jet Model  

Oh, Yun-Jung (한양대학교 대학원)
Kim, Sa-Yop (한양대학교 대학원)
Lee, Chang-Sik (한양대학교 기계공학부)
Park, Sung-Wook (한양대학교 기계공학부)
Publication Information
Journal of ILASS-Korea / v.15, no.4, 2010 , pp. 170-176 More about this Journal
Abstract
This paper describes the grid-size dependency of the conventional Eulerian-Lagrangian method to spray characteristics such as spray penetration and SMD in modeling DME sprays. In addition, the reduction of the grid-size dependency of the present Gas-jet model was investigated. The calculations were performed using the KIVA code and the calculated results were compared to those of experimental result. The results showed that the conventional Eulerian-Laglangian model predicts shorter spray penetration for large cell because of inaccurate calculation of momentum exchange between liquid and gas phase. However, it was shown that the gas-jet model reduced grid-size dependency to spray penetration by calculating relative velocity between liquid and ambient gas based on gas jet velocity.
Keywords
DME(Dimethyl ether); Gas-jet model; Grid dependency; KIVA-3V code; Lagrangian-Eulerian method;
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