Numerical Study Of Atmospheric Gravity Waves And Its Spectral Analysis

Computing Fluid Dynamics is a significant part of Computing Mathematics.It developed greatly since the widely use of Compute. It have solved many fluid mechanic problems from meteorology, traffic science, architecture science, bridge science and aviation science. And atmosphere gravity waves is now a part of mainstream meteorology. The move of atmosphere is controlled by Naiver-Stokes equations, but the analytic solution can not be obtained easily now. So we turn to numerical solution.In Chapter1, we introduced atmosphere gravity waves include its conception, mechanism and research significance. In Chapter2, we first consider fluid field under the condition of shear-stratified and unstable convection, and get its solution numerically. Then we find the relationship between the shear-stratified frequency and the related gravity waves frequency by spectral analysis methods .In the third chapter, we get the relationship between the unstable convection frequency and the associated gravity waves frequency similarly.In addition,we compared the forced effect the shear and the convection to the gravity waves. We end this thesis with a short chapter of conclusions and future works.