A Source Term Approach for Generation of One-way Acoustic Waves in the Euler and Navier-Stokes equations [0.03%]
基于欧拉和纳维斯托克斯方程的一维声波产生源项法研究
Kazuki Maeda,Tim Colonius
Kazuki Maeda
We derive a volumetric source term for the Euler and Navier-Stokes equations that mimics the generation of unidirectional acoustic waves from an arbitrary smooth surface in three-dimensional space. The model is constructed as a linear combi...
Influence of viscosity on the reflection and transmission of an acoustic wave by a periodic array of screens. The general 3-D problem [0.03%]
粘性对周期排列屏反射和透射声波的影响。一般三维问题
Dorel Homentcovschi,Ronald N Miles
Dorel Homentcovschi
An analysis is presented of the diffraction of a pressure wave by a periodic grating including the influence of the air viscosity. The direction of the incoming pressure wave is arbitrary. As opposed to the classical nonviscous case, the pr...