भारतीय प्रौद्योगिकी संस्थान तिरुपति

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Dr. Durga Prasad Challa

Assistant Professor

Areas of Interest

  • Forward and Inverse Scattering Problems
  • Scientific Computing
  • Cloaking and Effective Medium Theories


  • Ph.D, Johannes Kepler University & RICAM, Linz, Austria
  • M.Tech, Indian Institute of Technology Madras, India
  • M.Sc, Andhra University, Visakhapatnam, India

Latest Publications

  • D. P. Challa, A. Mantile and M.Sini. Characterization of the equivalent acoustic scattering for a cluster of an extremely large number of small holes. (Preprint)
  • H. Ammari, D. P. Challa, A. P. Choudhury and M.Sini. The point-interaction approximation for the fields generated by contrasted bubbles at arbitrary fixed frequencies. (Preprint)
  • D. P. Challa, A.P. Choudhury and M. Sini. Mathematical Imaging Using Electric or Magnetic Nanoparticles as Contrast Agents. Inverse Problems and Imaging (IPI), 12(3), 573-605, 2018.
  • D. P. Challa, F. Mouffouk and M. Sini. Modeling and simulation of the motion of nanoparticles in cylindrical capillaries allowing particle-to-wall interactions. Math. Meth. Appl. Sci.(M2AS), 40(8), 3111-3128, 2017.
  • F. Al-Musallam, D. P. Challa and M. Sini. The equivalent medium for the elastic scattering by many small rigid bodies and applications. IMA J Appl Math, 81(6): 1020-1050, 2016.
  • D. P. Challa and M. Sini. Multiscale analysis of the acoustic scattering by many scatterers of impedance type. Z. Angew. Math. Phys., 67(3):1–31, 2016.
  • A. Alsaedi, F. Alzahrani, D. P. Challa, M. Kirane and M. Sini. Extraction of the index of refraction by embedding multiple and close small inclusions. Inverse Problems, 32(4):045004, 18, 2016.
  • A. Alsaedi, B. Ahmad, D. P. Challa, M. Kirane and M. Sini. A cluster of many Dr. Durga Prasad Challa small holes with purely imaginary negative surface impedances may generate a negative refraction index. Math. Meth. Appl. Sci.(M2AS), 39(13):3607-3622,2016.

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