Acoustic Scattering Acoustic backscatter 1 Acoustic field measurement 1 Acoustic fields 1 Acoustic impedance 1 Acoustic wave backscattering 1 Acoustic wave propagation 1 Acoustic wave scattering 1 Alternating directions 1 Boundary-fitted grid 1 Circular waveguides 1 Crude oil 1 Drops 1 Fate and transport 1 Frequency dependent 1 Future applications 1 Galerkin methods 1 Heavy oil production 1 Helmholtz operators 1 Hydrocarbon droplets 1 Marine environment 1 Marine pollution 1 Numerical methods 1 Oil spills 1 Parabolic Equations 1 Partial differential equations 1 Petroleum transportation 1 Planktonic organisms 1 Spheres 1 Spherical droplets 1