In order to consider the solute drag effect in grain growth problem by “sd_kth” option, the user has to describe mobility in a text file consisting of four columns. What variable does each column represent?
In which versions of MICRESS is the “sd_kth” option active and applicable?
sd_kth option
Re: sd_kth option
Dear mtoloui,
I have to admit that I never personally used this option. Several years ago it was introduced in collaboration with Hendrik Strandlund from KTH who developed a solute drag model ("An effective mobility approach to solute drag in computer simulations of migrating grain boundaries", H. Strandlund, J. Odqvist and J. Ågren. Submitted manuscript.). With their model they calculated an effective mobility as a function of the driving force, which they provided as tabulated data. MICRESS uses only the first two columns of their output file, namely the driving force (J/mol) and the effective mobility (m^4/(Js)). In so far, this option has to be regarded as a special solution for KTH.
There is another option (dg_dependent) which is more general.
Bernd
I have to admit that I never personally used this option. Several years ago it was introduced in collaboration with Hendrik Strandlund from KTH who developed a solute drag model ("An effective mobility approach to solute drag in computer simulations of migrating grain boundaries", H. Strandlund, J. Odqvist and J. Ågren. Submitted manuscript.). With their model they calculated an effective mobility as a function of the driving force, which they provided as tabulated data. MICRESS uses only the first two columns of their output file, namely the driving force (J/mol) and the effective mobility (m^4/(Js)). In so far, this option has to be regarded as a special solution for KTH.
There is another option (dg_dependent) which is more general.
Bernd
Re: sd_kth option
What is the difference between “sd_kth” option and “dg_dependent” option?
Re: sd_kth option
The difference is just the units of the input parameters: The KTH model uses a hardcoded molar volume factor for steels to transform the driving force per mole to a driving force per volume, the mobility is in m instead of cm. The model is not meant for general use - maybe we should take it out from the options list!
Bernd
Bernd