Explanations of variables in example codes

[JianboLong]

Hello,

I am looking for the meaning of a particular variable, kappa,

kappa = freq * M_PI;

that is related to the ordinary frequency in solving Maxwells equations in the example codes (ex3 and ex31, for instances). Can anyone explain the meaning of it ? More genearally, I find the exact meanings of some variables in the examples are not well commented in the given examples. Does anyone know where we can get help regarding this matter ? Any detailed documentation online ?

Thanks !

[tzanio]

ping: @mlstowell

[v-dobrev]

In example 3, kappa is just an auxiliary variable used in the definition of the manufactured solution (function E_exact) used by the example. The freq variable controls the "frequency" of the manufactured solution in each spatial direction -- when freq = 1 (default) then the solution has one full sine wave over a distance of 2.

In example 31, I think it used similarly -- see the function E_exact for specifics.