| Author | Message | |||
     Harpreet Juneja (hsjuneja) New member Username: hsjuneja Post Number: 1 Registered: 11-2004 |
I am a graduate student at the Chemical Engineering Dept at The University of Arizona. We are trying to solve a system of coupled Pde's and Ode. I have attached a file which gives the list of equations and conditions. I don't really know if FlexPDE can help me, specially in inputing the 2nd and 3rd term on RHS of equation 3. Please if you could advice me how do I go about solving the problem. Thank You in advance.
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| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 259 Registered: 06-2003 |
I think applying FlexPDE to this system is fairly straightforward. A few items that arise are the following: 1) FlexPDE does not currently have a capability for one spatial dimension, so you must fake it with a 2D domain. Make the geometry a thin strip with a fictitious second space dimension. Include a diffusion term in the second dimension to stabilize the solution in that direction. 2) I assume your third equation describes a single global value Gg,bulk. Implement this as a "SCALAR VARIABLE". The point values at z=L can then be computed using the function VAL(<expression>,<x_coord>,<y_coord>). 3) The derivative boundary conditions are simply the NATURAL boundary conditions for the equations. Note, however, that the NATURAL() BC will mean D*dz(C). I suggest you download the evaluation version of FlexPDE and read through the User Guide. Then you can request a 30-day trial license to try your problem. |
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