MICRESS Forum

Dear mtoloui, the K term in our phase-field formulation is not a curvature as it has the dimension 1/cm2. It has some relation to curvature if we compare the PF equation to the Gibbs-Thomson relation by dividing both sides of the equation by the norm of the gradient of the phase-field parameter. But...

Dear mtoloui, For particle pinning, curvature is calculated independently from the K term by using the differences of the normal vectors for neighbouring cells. This is what you also find in the curvature output. By multiplying this curvature (1/µm) with the interface stiffness sigma* and correcting...

Dear mtoloui, The critical pinning force which has to be input in the MICRESS driving file is the driving force which is needed to overcome pinning. In the case of pure grain growth, the only source of driving force is the curvature of the grain boundary. This is the reason why we defined the critic...

Dear mtoloui,

if your question is whether the critical driving force, corresponding to a critical radius, in a 2D calculation is corrected for dimensionality, the answer is "no"!

Bernd

Dear Raghav, that's impossible! I tried your example on my computer with several versions and there was no problem! One reason I could imagine is that your driving file contains some hidden characters which are not retained if you post it e.g. into the forum - please try to rewrite the critical part...

I cannot reproduce the error you got, even if I try different 5.4 versions. I also cannot remember that we ever had this problem... Nevertheless, as a first step, I would recommend to try a more recent MICRESS version (5.408). If you do not have access to a newer binary, please give me your e-mail (...

Hi Raghav,

it is hard to imagine that MICRESS 5.4 would not allow you to start with zero grains. Unfortunately, I cannot test your input myself because there is a lot of double input lines in what you pasted! Can you please paste the original driving file you are trying to run?

Bernd

I remember that we had this problem in an older version of DP_MICRESS, it took too long to inflate the fonts while launching the program - can you please check whether you have installed the most recent version (5.900)? You can do this in the Windows Explorer if you right-click on the file and check...

How the driving force delta G is calculated in MICRESS using linearized phase diagrams? Using the keyword "linear" in the phase diagram input, one can define a linear phase diagram like the one shown below, where the two phase lines may (but need not) intersect for c=0 (note that the temperature T_0...

Apart from not showing any text, is DP_MICRESS working correctly, can you go e.g. through the output time steps?

Do you have different operating systems on your PC and on your Notebook?

Do you get any helpful messages in the Display_MICRESS text window?

Bernd