Hi @yiyang did it happen with one particular simulation project or does it always happen? Please (if you can) share the project with Sim4Life Application team via sending an email to s4-support@zmt.swiss to check. Thanks
We use standard units in the acoustic solver, which means we're solving the wave equation in pressure which has units of Pa.
Note though that the acoustic equation is Linear (careful, this doesn't apply to the nonlinear solver), which means that you can arbitrarily scale the input signal by a scalar and the output (in pressure) will be exactly the same and scaled by that same constant. (You need to be careful when you consider energy related quantitites which are something something pressure squared)
Essentially, find the scaling factor between pressure and voltage (assuming linearity), then run your simulation with an arbitritrary amplitude and then scale the pressure output.
@dbsim4
Answering my own question:
In the Modelling tab (not simulation), each imported label/voxel type can be assigned a material in the Controller window.
Auto Assign seems to work decently well if the materials in the file are well named.
Probably should be done before dragging the model into the Simulation.
@montanaro Thank you! The acoustic reflection simulation is now behaving and giving results which map to what you'd expect.
Thank you so much for helping! Jean
Dear Shreya,
I assume you meant simulated 1g and 10g SAR values. If you are referring to dipole antenna tutorial, it is not possible to extract SAR values since the simulation project does not contain any lossy object - it is just a dipole antenna in free-space. Please check "SAR in a Flat Phantom" tutorial and section 3.1.4 of Sim4Life tutorial document for details related to SAR simulation and extractions.
Dear AntoninoMC,
Thank you for your comprehensive solution!!!
Following your advice, I assigned distinct priorities to each tissue, and there is no more need for boolean operations (subtraction). This approach proved to be completely successful.
Hi @tcs,
EM LF Electro QS simulations are electric simulations executed in the LF approximation, where the electric and the magnetic fields are decoupled. Therefore, the electric simulations do not produce any magnetic-related quantity (H and A-field).
In order to simulate problems involving magnetic fields, one of the EM LF Magneto solvers need instead to be used).
If your problem involves radiofrequency EM fields instead (e.g. above 1MHz), the EM LF solvers may be inadequate and you should use the FDTD solvers.
All the best!
Hi Micol,
Did you model the waveguide filling (where you placed the waveguide source) and set the material parameters of this object correctly in the simulation settings?
Something must be wrong in your simulation setup. It is unlikely to be due to the fact that it is a multiport simulation (since under the hood a multiport simulation is just a bunch of "single" FDTD simulations). I would suggest you check the voxels of your simulation (View Voxels) and ensure that they accurately represent what you are trying to simulate. Pay special attention to the sources and the connectivity between the sources and the various PEC elements.
Hi Anna, I see that nobody answered to your question. Were you able to run this type of simulation? I would like to to a phototermal therapy as well using metallic nanoparticles with a laser. I am not sure if with sim4life this type of simulation can be done or not. If you could tell your experience on this, it would be great.
Thanks in advance for your time and help,
All the best,
@AnnaGol
Hi Michael,
Yes, this sounds reasonable. You define the frequency in the Setup settings of the simulation, and you define three boundary conditions, -1, +1, and 0V.
Best,
Habib
