| Author | Message | ||
     H., zaher (zmh02) New member Username: zmh02 Post Number: 1 Registered: 12-2004 |
Hello, Can Flexpde deal with simple spherical geometries? For instance 1D heat and mass transfer in a sphere? Thanks, Zaher | ||
| Mohammad Rahmani (mrahmani) Member Username: mrahmani Post Number: 22 Registered: 10-2004 |
It is very simple. You need to declare the Cylindrical Coordinate and then setup a half sphere by drawing a quarter circle. There are several posts in this regard in FlexPDE forum, simply make a search. You can also consult the FlexPDE reference manual and Field of Physics by Finite Element both available for download through PDESolutions website. /Mohammad | ||
| Mohammad Rahmani (mrahmani) Member Username: mrahmani Post Number: 23 Registered: 10-2004 |
It is very simple. You need to declare the Cylindrical Coordinate and then setup a half sphere by drawing a quarter circle. There are several posts in this regard in FlexPDE forum, simply make a search. You can also consult the FlexPDE reference manual and Field of Physics by Finite Element both available for download through PDESolutions website. /Mohammad | ||
| Mohammad Rahmani (mrahmani) Member Username: mrahmani Post Number: 24 Registered: 10-2004 |
It is very simple. You need to declare the Cylindrical Coordinate and then setup a half sphere by drawing a quarter circle. There are several posts in this regard in FlexPDE forum, simply make a search. You can also consult the FlexPDE reference manual and Field of Physics by Finite Element both available for download through PDESolutions website. /Mohammad | ||
| Mohammad Rahmani (mrahmani) Member Username: mrahmani Post Number: 25 Registered: 10-2004 |
Sorry for these triplicated message. There was a problem with my navigator. /Mohammad | ||
| H., zaher (zmh02) New member Username: zmh02 Post Number: 2 Registered: 12-2004 |
Hello Mohammad, Thanks much for the advice. zaher | ||
| marlouch (marlouch) Member Username: marlouch Post Number: 6 Registered: 07-2006 |
Hi Forum, I'd like to figure a shape of bean by 3-D function of FlexPDE. However, it's difficult for me to describe the bean shape. I have studied the user guide but cannot create one yet. Moreover, I would like to fix a parameter not uniformly but randomly into a cube. Do anybody know how to structure a bean shape and how to use a random function ? Thank you. marlouch | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 725 Registered: 06-2003 |
There are two ways you might create a bean shape: 1) devise a mathematical expression for the top surface of the bean as a function z(x,y). Lay the bean flat, so that z(x,y) is single-valued. Specify the first surface as -z(x,y) ant the second surface as z(x,y). Define the outer boundary as the bounding path. If the expression becomes vertical at the edge, draw the bounding path a little inside the vertical position, so there is a short vertical wall at the edge. 2) Define the function z(x,y) as a TABLE, and proceed as in (1). If you use RANDOM in a parameter expression, it will be called repeatedly during solution, returning different values each time. So the solution will never terminate. You should generate the random parameter distribution externally, and read it in as a table or transfer. I haven't tried the TRANSFER method, but if you make a second script that generates and exports the parameter distribution, you should be able to export and import it as a TRANSFER. |