Hi All,
Thank you so much for taking the time to read this. I am currently encountering some issues with finding a solution for my simulation. For some background, I have a 2D simulation of an acoustically actuated microswimmer in a tank filled with water that generates 2nd order steady streaming. The microswimmer is actuated by a piezoelectric plate underneath at frequency f0 via Thermoviscous Acoustic-Structure Boundary, and the resulting acoustic velocity is found via Frequency Domain. Then these results are linked and used in a Stationary study for Laminar flow to obtain the 2nd order steady streaming caused by the oscillation of the microswimmer tail. While these simulations work/converge for microswimmer eigenfrequencies corresponding to modes up to the 5th order, the stationary study starts failing to converge at f0 = 24.104kHz, which is the 6th order eigenfrequency of the microswimmer. I am very curious on why this is so and would greatly appreciate any help. I have also attached my simulation. Thanks!