01 / SOLVER
Pressure field
Pulse train, attenuation, impedance reflection and acoustic shadow, evaluated per pixel each frame.
SIM / Coupled acoustics & flow
Ultrasound-driven fluid dynamics.
A pressure field and an incompressible fluid solver, coupled. Acoustic radiation force from the transducer drives the velocity field; the velocity field advects the medium the wave has to cross. Energise the array and watch the streaming develop.
Solver idle — press run simulation to energise the array
- State
- STANDBY
- Duty cycle
- 5%
- Mechanical index
- 0.31
- Spatial-peak intensity
- 38 mW/cm²
- Grid
- 256 × 256
The velocity field is solved with Jacobi pressure projection and semi-Lagrangian advection. Raising the duty cycle increases the time-averaged radiation force, and the streaming jet forms faster.
02 / COUPLING
Radiation force
Time-averaged acoustic force injected into the velocity field — the mechanism behind acoustic streaming.
03 / FLOW
Incompressible advection
Jacobi pressure projection and semi-Lagrangian advection keep the medium divergence-free as it moves.