41 citations · 135 across the 12 of their papers we have counts for
12 papers
Elastic fields generated by multiple small inclusions with high mass density at nearly resonant frequencies
Durga Prasad Challa, Divya Gangadaraiah, Mourad Sini
We derive the elastic field generated by multiple small-scaled inclusions distributed in a bounded set of . These inclusions are modeled with moderate values of the L…
Extraction of the mass density using only the -parts of the elastic fields generated by injected highly dense small inclusions
Durga Prasad Challa, Divya Gangadaraiah, Mourad Sini
We propose a reconstruction method to extract the variable mass density from the elastic farfields, with a single incident direction, measured before and after injecting highly den…
The equivalent media generated by bubbles of high contrasts: Volumetric metamaterials and metasurfaces
Habib Ammari, Durga Prasad Challa, Anupam Pal Choudhury +1
We deal with the point-interaction approximations for the acoustic wave fields generated by a cluster of highly contrasted bubbles for a wide range of densities and bulk moduli con…
The point-interaction approximation for the fields generated by contrasted bubbles at arbitrary fixed frequencies
Habib Ammari, Durga Prasad Challa, Anupam Pal Choudhury +1
We deal with the linearized model of the acoustic wave propagation generated by small bubbles in the harmonic regime. We estimate the waves generated by a cluster of small bubb…
Characterization of the equivalent acoustic scattering for a cluster of an extremely large number of small holes
Durga Prasad Challa, Andrea Mantile, Mourad Sini
We deal with the time-harmonic acoustic waves scattered by a large number of small holes, of maximal radius , arbitrary (i.e. not necessarily periodically) distributed in…
Mathematical imaging using electric or magnetic nanoparticles as contrast agents
Durga Prasad Challa, Anupam Pal Choudhury, Mourad Sini
We analyse mathematically the imaging modality using electromagnetic nanoparticles as contrast agent. This method uses the electromagnetic fields, collected before and after inject…