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- TL;DR Summary
- How to deal with "non-compressible" fluids?

I am doing a learning project by writing a simulation that includes capacitance and current flow amongst capacitors that may potentially be in parallel. I don't care about certain details yet - dissipation factor, frequency dependent effects, temperature. Tiny capacitences within diode junctions and (importantly) FET gates are the relevant charge storage elements.

A pretty fundamental sub-problem eventually arises: what unit would one substitute for the Newton to describe the magnitude of interaction between motionless and effectively mass-less particles in a classical field simulation? I want to "simplify" the system so that my particles are essentially a non-compressible fluid, with the obvious immediate implication being that Newton's first law effectively goes away. Intuitively I need some kind of unit that works independently of acceleration, (and some googleable terms or else I just get pointed to a pile of "what is force?" articles.)

Are there methods for starting from a "fictitious shove magnitude" as a force surrogate for establishing initial conditions that later convert to back into conventional units for currents and voltages etc? I have looked at how spice handles operating point analysis with its initial conditions approximation, but I'm investigating alternatives.

Clues greatly appreciated!

A pretty fundamental sub-problem eventually arises: what unit would one substitute for the Newton to describe the magnitude of interaction between motionless and effectively mass-less particles in a classical field simulation? I want to "simplify" the system so that my particles are essentially a non-compressible fluid, with the obvious immediate implication being that Newton's first law effectively goes away. Intuitively I need some kind of unit that works independently of acceleration, (and some googleable terms or else I just get pointed to a pile of "what is force?" articles.)

Are there methods for starting from a "fictitious shove magnitude" as a force surrogate for establishing initial conditions that later convert to back into conventional units for currents and voltages etc? I have looked at how spice handles operating point analysis with its initial conditions approximation, but I'm investigating alternatives.

Clues greatly appreciated!