中文核心期刊
CNKI期刊全文数据库
中国科学引文数据库(CSCD)源期刊
中国科技论文统计源期刊
万方数据知识服务平台
英国《科学文摘》(SA)
美国化学文摘(CA)
俄罗斯《文摘杂志》(AJ)
德国《天文学与天体物理学文摘》(AAA)
英国《中国天文学和天体物理学》(SCI收录)全文摘译期刊之一
《中国学术期刊文摘》
《中国物理文摘》
《中国天文学文摘》

• 论文 • Previous Articles     Next Articles

Numerical Study on the Propagation of Gravity-Wave Packet in Time-Variant Background Fields

HUANG Kaiming ,ZHANG Shaodong   

  1. School of Electronic Information, Wuhan University, Wuhan 430079
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-01-15 Published:2006-01-15

Abstract: By using 2nd order operator-splitting scheme,numerical simulations of nonlinear propagation for a Gaussian gravity-wave packet in time-variant background temperature and wind fields are carried out individually. The simulation results show that the time-variant background fields influence little on the spacial structure of the wave packet, and the polarization relations of each wave disturbance components agree well with that of the linear gravity wave theory. Propagating in a time-variant background temperature field, the propagation paths of the gravity-wave packet are obviously different from the paths derived from the linear wave theory, and the variational tendency of the horizontal and vertical group-velocities are little difference is found in the variation of wave opposite to prediction of the linear theory, and a frequency between the simulation result and the dispersion relation of gravity wave.These indicate that the linear wave theory isn't feasible to describe quantitatively the nonlinear propagation of the gravity wave packet in time-variant background fields. While in a time-variant background wind field, the background impacts more significantly on the wave frequency than in time-variant background temperature field, and the propagation paths is more close to the paths of the linear theory than that in a steady-state background field.

Key words: Single Event Effect, Neutron, Sensitive volume