In short I have an equation of this kind in my sets my equations
-\nabla\nabla p=nabla(D1(phi)\nabla D2(phi))+q1(phi)+q2(phi) D1(phi)=1-phi D2(phi)=1-phi the unknown is p how do the second term of the above equation? 2008/8/28 franck kalala <[EMAIL PROTECTED]> > I thinking about that. I was using one document in which I picked up this > example. As you can in the attached file I sent to you there is non boundary > conditions for phi and I think may be the problem should be there. I have > check every where in the document I have, they have not mentioned initial > conditions, sure they forgoted to mentioned them. Daniel according to plot > in the attached file, I want to try or I guess these boundary conditions: > > phi=0.9 at x=0 > phi=0.3 at x=1 > > and other values of phi (the approximations) are in between. we can try > these boundaries. > > if this not work, I will join by the week end the author to know if there > are other boundary conditions or if he just forgot it. > > Regards > > 2008/8/28 Daniel Wheeler <[EMAIL PROTECTED]> > >> >> What should are the boundary conditions for phi? >> >> On Tue, Aug 26, 2008 at 1:58 PM, franck kalala >> <[EMAIL PROTECTED]> wrote: >> > Thanks Jonathan for your hint, it was very helpfully for me and I don't >> have >> > that error message, >> > But i have some strange plot, the value of phi at left and right are >> very >> > huge in contradiction of the initial value of phi. and the plot of p >> still a >> > straight line at value 1 and the plot of phi must be between o and 1. >> but >> > this is not the case, may you try jonathan to run my code and try to see >> > what happened. >> >> >> >> -- >> Daniel Wheeler >> >> > > > -- > *********************************************** > *********************************************** > Franck Kalala Mutombo > [EMAIL PROTECTED] > African Institut for Mathematical Sciences, Muizenberg Cape Town, South > Africa > [EMAIL PROTECTED] > ************************************************ > ************************************************ > -- *********************************************** *********************************************** Franck Kalala Mutombo [EMAIL PROTECTED] African Institut for Mathematical Sciences, Muizenberg Cape Town, South Africa [EMAIL PROTECTED] ************************************************ ************************************************
