Near-surface simulations of the acoustic field

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Near-surface simulations of the acoustic field

• Konstantin Parchevsky
• Stanford University, HEPL

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Brief description of the code

1. Equations linearized 3D Euler equations with
   force or pressure sources.
2. Background model convectively stabilized JCD
   Vernazza Avrett chromosphere (N2 gt0).
3. Numerical scheme Semidiscrete,
   strong-stability-preserving Runge-Kutta time
   advancing scheme with spatial filtering.
4. Spatial discretization dispersion-relation-preser
   ving high-order scheme with stable consistent
   boundary conditions with summation-by-parts
   properties.
5. Boundary conditions non-reflecting boundary
   conditions based on perfectly matching (PML)
   layer .

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Power maps (observations)
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Power maps (simulations)
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Future plans

1. Produce artificial data for estimation of
   accuracy of the inversion procedure of
   helioseismic data.
2. Simulate interaction of acoustic field from
   multiple sources with a sunspot (change the
   background model).
3. Calculate the Greens functions for point dipole
   source and sensitivity kernels for multiple
   sources and compare them with Aarons ones.
4. Include magnetic field and background flows.