A pseudodifferential equation with damping for one-way wave propagation in inhomogeneous acoustic media

C.C. Stolk

    Research output: Contribution to journalArticleAcademicpeer-review

    23 Citations (Scopus)
    7 Downloads (Pure)

    Abstract

    A one-way wave equation is an evolution equation in one of the space directions that describes (approximately) a wave field. The exact wave field is approximated in a high frequency, microlocal sense. Here we derive the pseudodifferential one-way wave equation for an inhomogeneous acoustic medium using a known factorization argument. We give explicitly the two highest order terms, that are necessary for approximating the solution. A wave front (singularity) whose propagation velocity has non-zero component in the special direction is correctly described. The equation cannot describe singularities propagating along turning rays, i.e. rays along which the velocity component in the special direction changes sign. We show that incorrectly propagated singularities are suppressed if a suitable dissipative term is added to the equation.
    Original languageEnglish
    Pages (from-to)111-121
    Number of pages11
    JournalWave motion
    Volume40
    Issue number2
    DOIs
    Publication statusPublished - 2004

    Keywords

    • Acoustic equation
    • One-way wave equation
    • Pseudodifferential calculus
    • MSC-35L05
    • MSC-35S10

    Fingerprint Dive into the research topics of 'A pseudodifferential equation with damping for one-way wave propagation in inhomogeneous acoustic media'. Together they form a unique fingerprint.

    Cite this