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Re: Finite Element Analysis ?
Posted:
Sep 26, 2013 4:39 AM


On Thursday, September 26, 2013 7:43:08 PM UTC+12, Manish wrote: > "Nasser M. Abbasi" wrote in message <l20k26$g43$1@speranza.aioe.org>... > > > On 9/26/2013 12:54 AM, Manish wrote: > > > > I am looking to solve 5 dependent partial differential equations and calculating > > > >5 variables in 2 dimensions (1 spatial and 1 time). > > > > > > > > Please tell me if the procedure I am following is right: > > > > 1. Specifying geometry in 1 D. > > > > 2. Initial Values > > > > 3. Meshing > > > > 4. Applying governing equations > > > > 5. Applying Boundary Values and solving. > > > > > > > > Can someone tell me what procedures should I be looking at, to solve the problem ? > > > > > > > > Regards, > > > > Manish > > > > > > > > > > FEM is normally used to solve elliptic type pde problems, > > > so for time dependent problems, you would need different time step > > > based integration method, then apply FEM again at the new time step, > > > and so on. > > > > > > i.e FEM is applied at each time instance, to obtain a solution > > > for that time instance, but need separate timedependent integration > > > to go to the next time step, using the state of the last time > > > step, and so on. i.e. marching in time step is separate from > > > solving using the FEM. > > > > > > But I am no expert on this, so I would suggest to use a good > > > textbook for these things. > > > > > > Nasser > > Dear Nasser, > > > > Thanks for your reply. You are right, FEM will work using numerical techniques. > > But how do I do the following in MATLAB: > > 1. Specifying geometry in 1 D > > 2. Initial Values > > 3. Meshing > > 4. Applying more than 4 interdependent governing equations > > 5. Applying Boundary Values and solving PDEs.
I think you're asking a bit of much of this newsgroup. I took a year's postgrad course to learn how to do this and you expect us to instruct you in a few lines? Get a textbook or take a course, then come back here when you have formulated the numerical scheme and have a Matlab coding problem.



