RL circuit vs. LR circuit: different output

[ahkab]

RL circuit vs. LR circuit: different output

[itdaniher]

edited with block quotes and a definition of DeltaPressure = 1

the crux of the issue is the size of the inductor (and probably to a lesser extent, the resistor) - 1E7 henries is uh probably the size of your average house, with 1E3 henries as the approximate inductance of a 3 gigawatt mains transformer...

From > https://en.wikipedia.org/wiki/Orders_of_magnitude_(inductance)

[moredroplets]

@itdaniher I need some time to figure out how to scale down the equivalent inductance and resistance for a microfluidic device. As such a system is almost always highly nonlinear, I think it would be very hard to do so. Is that possible to make the library F64 internally if it's F32? Thanks for your help.

[itdaniher]

After checking, it's all using Python's default float type, with no specified width as one might expect were it using numpy datatypes internally. This means it's already F64, which suggests the issue is not as simple as using a datatype with insufficient precision.

[moredroplets]

One way to get around this is to change the unit system from "kg, meter, second" to something else, e.g., "g, um, second", so that the fluidic equivalent inductance, resistance, and capacitance values are more in line with what Ahkab can handle. This should work without changing anything in this library.

[itdaniher]

Sounds like something of a fix. Hopefully enough to get let you make forward progress in your work!