Open AccessAn equivalent mass source method for internal waves generated by a body moving in a stratified fluid of finite depth
Author(s) -
Yancheng You,
Zhao Xian-qi,
Ke Chen,
Wei Gang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6750
Subject(s) - internal wave , mechanics , physics , displacement (psychology) , kinematics , vortex shedding , turbulence , fourier transform , amplitude , classical mechanics , acoustics , optics , reynolds number , psychology , quantum mechanics , psychotherapist
An equivalent mass source is modeled as excited sources of internal waves generated by the displacement of fluid and the wake of vortex shedding or turbulence due to the body moving in a stratified fluid, a mathematical model for the vertical displacement of internal waves generated by such an equivalent mass source is presented by use of both the associated eigenvalue problem and the Fourier transform method, and the method for estimating the speed, length and diameter of the equivalent mass source is proposed. Calculations based on the proposed method are performed for the generation of internal waves by a towed sphere in a stratified fluid, and the numerical results are in good agreement with the available experimental results of Robey in the kinematic wave patterns and the maximum peak-to-peak amplitude of the internal waves. Such a method may have potentially important applications.