Modify init_sim!(s::RamAirKite, ...; ...)

[ufechner7]

The function

function init_sim!(s::RamAirKite;
    solver=ifelse(s.set.quasi_static, FBDF(nlsolve=OrdinaryDiffEqNonlinearSolve.NLNewton(relax=0.6)), FBDF()), 
    adaptive=true, prn=true, precompile=false, remake=false, reload=false, lin_outputs=Num[]
)

should be modified such that:

• the parameter solver is removed; instead, the solver should be created inside of this function, based on the settings in rak.set
• the integrator should be returned
• the doc string should be updated

[1-Bart-1]

I don't want to remove the solver argument completely. The settings solver is not a replacement for the full DifferentialEquations interface: https://docs.sciml.ai/DiffEqDocs/stable/solvers/ode_solve/
What if a user wants to test with different relaxations, or other solver parameters?

So what I will do:

function init_sim!(s::RamAirKite;
    solver=nothing, 
    adaptive=true, prn=true, precompile=false, remake=false, reload=false, lin_outputs=Num[]
)
    if isnothing(solver)
        # use settings solver
    end

[ufechner7]

Relaxation is part of the Settings struct. The user should not do much programming anyways, the user should just modify Settings.yaml and run a simulation.

[1-Bart-1]

I am a user of this software as well, and I still want to be able to test different solvers easily.