Born approximation of acoustic radiation force and torque on inhomogeneous objects

Area of Science:

• Acoustics
• Fluid Dynamics
• Materials Science

Background:

• The Born approximation previously modeled acoustic radiation force and torque on homogeneous objects.
• Existing models have limitations regarding object complexity and material properties.

Purpose of the Study:

• Extend the Born approximation to model acoustic radiation force and torque on inhomogeneous objects.
• Apply the extended model to objects with distinct material regions and continuously varying properties.

Main Methods:

• The study extends the previously developed Born approximation.
• The model is applied to objects with connected homogeneous regions and continuously varying material properties.
• Calculations were performed for spheres, finite cylinders, and prolate spheroids.

Main Results:

• The extended Born approximation successfully models acoustic radiation force and torque on inhomogeneous objects.
• The model accommodates objects with complex internal structures and material variations.
• The method is validated through calculations on various geometric shapes.

Conclusions:

• The extended Born approximation provides a versatile tool for analyzing acoustic radiation forces on inhomogeneous objects.
• This advancement expands the applicability of acoustic radiation force modeling to more complex scenarios.
• The model's restrictions include incident fields not resembling plane waves and object properties not differing substantially from the surrounding fluid.