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氣液兩相流數(shù)值求解過(guò)程中虛假流動(dòng)問(wèn)題研究
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國(guó)家自然科學(xué)基金資助項(xiàng)目(50676107、50876007)、北京市自然科學(xué)基金資助項(xiàng)目(3102024)和中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(KMJB11055536)


Spurious Currents during Numerical Simulation of Gas-liquid Two-phase Flow
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    摘要:

    基于靜止液滴問(wèn)題，對(duì)氣液兩相流數(shù)值求解過(guò)程中的虛假流動(dòng)問(wèn)題進(jìn)行了研究。對(duì)虛假流動(dòng)的涵義和特征進(jìn)行了描述和分析，研究了表面張力、液體粘度等因素對(duì)虛假流動(dòng)的影響。研究發(fā)現(xiàn)，計(jì)算域中虛假速度平均值與計(jì)算時(shí)間之間存在特定函數(shù)關(guān)系，并通過(guò)曲線擬合給出了相應(yīng)的函數(shù)表達(dá)式，從而為虛假流動(dòng)的削弱和消除提供了一個(gè)方法。分析了虛假流動(dòng)成因，指出相界面遷移過(guò)程追蹤方法的改進(jìn)可有效削弱虛假流動(dòng)現(xiàn)象，并通過(guò)CLSVOF方法與VOF方法模擬結(jié)果的對(duì)比對(duì)該結(jié)論進(jìn)行了驗(yàn)證。

    Abstract:

    The spurious currents were studied based on the stationary droplet problem. The conception of spurious currents and their characteristics were described. The effect of surface tension and liquid viscosity on spurious currents was analyzed. It was found that there was a certain relationship between the average spurious velocity and the computing time. This conclusion could provide an idea to weaken or eliminate the spurious currents. The cause of the spurious currents was analyzed and found that the modification of the phase interface simulation method could weaken spurious currents obviously, and this conclusion was validated by the comparison of the simulation results of CLSVOF method and VOF method.

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寧智,王春海,宋云超.氣液兩相流數(shù)值求解過(guò)程中虛假流動(dòng)問(wèn)題研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(2):192-197. Ning Zhi, Wang Chunhai, Song Yunchao. Spurious Currents during Numerical Simulation of Gas-liquid Two-phase Flow[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(2):192-197.

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  • 在線發(fā)布日期: 2012-02-17
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