Recent content by Avarus

Thanks for the suggestions! For now I'll stick to the directory-tree structure, but in the future I might consider HDF5 data structure. I've actually used that format before, so perhaps I can build a properly structured database in that way... By the way if anyone else has any more suggestions...

Hey all, This may be a bit of a stupid question, but I'll ask it anyway... For the past weeks I've been running some DEM (discrete element method) simulations, and each simulations produces a couple output files and has different input variables/commands stored in a separate file. Already I...

Thanks for the suggestions. What I did not include into this post is that the slope will be calculated using OLS over the number of datapoints that are required to make the slope significant, i.e. the difference between the starting and end point being 20x standard deviation of the noise...

Hi all, I'm not quite sure if this is the right place to post my question, so forgive me if its not... I've written a program in Python that analyses data that I got from a compression experiment (mechanical testing of rocks and such), and I've written a piece of code that estimates the...

Could anyone still give me a hand on my post above?

When I separate the 2nd equation, I get the following (if I'm correct): \frac{dc}{1-\frac{c}{c_{eq}}} = \frac{4πk}{V}r^{2}dt Which solves to: -c_{eq}ln(1-\frac{c}{c_{eq}}) = \frac{4πk}{V}\int r^{2}dt + constant But I do not yet know what \int r^{2}dt is, only \frac{dr}{dt}. Did I do...

Ok guys, this problem keeps bugging me and I've revised the whole thing (again, sigh...) and came to the conclusion that I've made some errors along the way (again, sigh...). Now I have these sets of equations: \frac{dr}{dt} = -\frac{M}{ρ}k(1-\frac{c}{c_{eq}}) and \frac{dc}{dt} =...

So it is a coupled differential equation then? Such a shame :(. I should have known... Thanks everyone!

Oh I'm sorry, I thought coupled would be appropiate terminology, since one is related to the other and visa verse. But thanks for putting that straight :) How did you find those solutions? (Btw, c(o) = 0 in this particular case) I have the teacher's numerical solution attached as a graph, so...

Well, problem still is that I don't know either r(t) or c(t). But I do know r(0) and c(0), and that dc/dt = k @ t = 0, perhaps that helps?

Ok guys, I've got an issue with a coupled differential equation and I just can't get to solve it: \frac{\partial r}{\partial t} = Q\frac{\partial c}{\partial t} Obviously, r depends on c and visa versa, but they both depend on time. Is there a way to uncouple these variables and solve the...