| Author | Message | ||
     Manos Karagiannis (man0s) New member Username: man0s Post Number: 1 Registered: 10-2003 |
Hi! I would be grateful if you could help me resolving a couple of questions considering FlexPDE. Does the software allow a moving boundary condition? ie Can the dimensions of the regions be altered while the algoritmh is running? Is it possible to incorporate in the boundary's definition the time step information, in the case that DT is not pre-defined? How can one compute the location of an extremum, while the alorithm is running? Thanks | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 46 Registered: 06-2003 |
The current version of FlexPDE does not allow moving boundaries. This facility is under development, and should be released late this year or early next. You can run "staged" steady-state problems in which the domain is changed in each stage. FlexPDE attempts to solve partial differential equations systems. "Timestep" is not a characteristic of partial differential equations, but only of various approximation techniques. Since the approximation technique is chosen by FlexPDE based on its evaluation of the system characteristics, it would be pointless (and probably destabilizing) for you to use it for anything. The word DELTAT evaluates to the current timestep. The function GLOBALMAX(expression) can be used to find the maximum value of any expression. The functions GLOBALMAX_X(expression), GLOBALMAX_Y(expression) and GLOBALMAX_Z(expression) return the coordinates of the maximum point. See the Help Index under "Global". |