update_parms: Adjust termination criteria for while loop in IR

update_parms(t::TERM = term_parms; Cr = 20.0, Ce = 1.0,
       Rmax = 0.5, litmax=1000

)

C. T. Kelley, 2025

Update the termination parameters in MultiPrecisionArrays.

This changes the values of the parameters. I do not recommend that you mess with this unless you have a good reason. One such reason might be that the default limit on the number of iterations (1000, essentially infinite) is giving you many iterations that make very little progress. Changing Rmax is probably a better way to control this.

Note that the default values for the kwargs are the defaults, so unless you specify otherwise, any parameter will take its default value.

We store the parameters in a mutable structure TERM

mutable struct TERM
       Cr::Real
       Ce::Real
       Rmax::Real
       litmax::Int
end

where the fields are the parameters. The parameters we use in the solvers are in a global TERM structure defined in the main module.

term_parms=TERM(20.0, 1.0, .5, 1000)

As you can see, I start with the defaults. When you make changes, you write into this structure and it is your job to keep track of what you did.

To query the parameters type the name of the structure

julia> term_parms
MultiPrecisionArrays.TERM(2.00000e+01, 1.00000e+00, 5.00000e-01, 1000)

To change Cr from 20 to 40 type

julia> update_parms(; Cr=40.0)
MultiPrecisionArrays.TERM(4.00000e+01, 1.00000e+00, 5.00000e-01, 1000)

To change Ce to 5 and revert Cr back to the default

julia> update_parms(; Ce=5.0)
MultiPrecisionArrays.TERM(2.00000e+01, 5.00000e+00, 5.00000e-01, 1000)

Finally, to get the defaults back, enter no changes.

julia> update_parms(;)
MultiPrecisionArrays.TERM(2.00000e+01, 1.00000e+00, 5.00000e-01, 1000)