...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Mechanical Science and Technology >Numerical study of effects of accommodation coefficients on slip phenomena
【24h】

Numerical study of effects of accommodation coefficients on slip phenomena

机译：调节系数对滑移现象影响的数值研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An unstructured mesh Navier-Stokes solver employing a Maxwell slip boundary condition was developed. The present flow solver was applied to the simulation of flows around an axisymmetric hollow cylinder in a Mach 10.4 freestream, known as Calspan-UB Research Center (CUBRC) Run 14 case, and the velocity slip and the temperature jump on the cylinder surface were investigated. The effect of tangential momentum and thermal accommodation coefficients used in the Maxwell condition was also investigated by adjusting their values. The results show that the reverse flow region is developed on the body surface due to the interaction between the shock and the boundary layer. Also, the shock impingement makes pressure high. The flow properties on the surface agree well with the experimental data, and the velocity slip and the temperature jump vary consistently with the local Knudsen number change. The accommodation coefficients affect the slip phenomena and the size of the flow region. The slip phenomena become larger when both tangential momentum and thermal accommodation coefficients are decreased. However, the range of the reverse flow region decreases when the momentum accommodation coefficient is decreased. The characteristics of the momentum and thermal accommodation coefficients also are overlapped when they are altered together.
机译：开发了采用麦克斯韦滑移边界条件的非结构化网格Navier-Stokes求解器。该流动求解器被应用于模拟在10.4马赫自由流中轴对称空心圆柱体周围的流动，这被称为Calspan-UB研究中心（CUBRC）Run 14案例，并研究了圆柱体表面的速度滑移和温度跳变。还通过调整它们的值来研究在麦克斯韦条件下使用的切向动量和热调节系数的影响。结果表明，由于冲击与边界层之间的相互作用，在身体表面形成了逆流区域。而且，冲击冲击使压力高。表面上的流动特性与实验数据吻合得很好，并且速度滑移和温度跃变随局部克努森数的变化而一致地变化。调节系数影响滑移现象和流动区域的大小。当切向动量和热调节系数均减小时，滑移现象变大。然而，当动量调节系数减小时，逆流区域的范围减小。当动量系数和热调节系数一起改变时，它们的特性也会重叠。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号