The subject of this paper is to present a theory for the dynamic radiation force produced by dual-frequency ultrasound beams in lossless and non-dispersive fluids. A formula for the dynamic radiation force exerted on a three-dimensional object by a dual-frequency beam is obtained stemming from the fluid dynamics equations. Dependence of the dynamic radiation force to nonlinear effects of the medium is analyzed. The developed theory is applied to calculate the dynamic radiation force exerted on solid elastic (brass and stainless steel) spheres by a low-amplitude dual-frequency plane wave. The dynamic radiation force is calculated by solving the dual-frequency plane wave scattering problem for solid elastic spheres. Results show that the dynamic radiation force on the analized spheres presents fluctuations similar to those present in the static radiation force. Furthermore, analysis of the static and the dynamic radiation forces on the stainless steel sphere shows that they have approximately the same magnitude.
Revealing mesoscale bubble and particle dynamics in ultrasound-driven multiphase fluids by ultrafast synchrotron X-ray radiography and hybrid modelling
University of Hull（赫尔大学）；University of Wyoming（怀俄明大学）；Oxford Brookes University（牛津布鲁克斯大学）；Brunel University London（伦敦布鲁内尔大学）；Argonne National Laboratory（阿贡国家实验室）
Comments on An implicit-Chebyshev pseudospectral method for the effect of radiation on power-law fluid past a vertical plate immersed in a porous medium, by N.S. Elgazery,CNSNS,2008
Microbubble surface instabilities in a strain stiffening viscoelastic material
School of Engineering, Brown University（布朗大学工程学院）；Department of Mechanical Engineering, University of Michigan（密歇根大学机械工程系）；Department of Biomedical Engineering, University of Michigan（密歇根大学生物医学工程系）；Department of Biomedical Engineering, The University of Texas at Austin（德克萨斯大学奥斯汀分校生物医学工程系）；Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin（德克萨斯大学奥斯汀分校航空航天工程与力学系）；Texas Materials Institute, The University of Texas at Austin（德克萨斯大学奥斯汀分校德州材料研究所）
