 |
 |
 |
|
|
|
[Sponsors] | ||||
March 27, 2005, 14:16
|
Second derivative
|
#1 |
|
Guest
Posts: n/a
|
Hi cfx users,
Still don't manage to calculate d2u/dx2, which is equal to Velocity u.Gradient x.Gradient x Someone to help me?? Thanks, Thomas |
|
|
||
|
March 28, 2005, 13:02
|
Re: Second derivative
|
#2 |
|
Guest
Posts: n/a
|
can you explain you problem more detailed? calculate d2u/dx2 in the CFX-UDF? or in other place?
|
|
|
|
||
|
March 28, 2005, 14:38
|
Re: Second derivative
|
#3 |
|
Guest
Posts: n/a
|
Hey. I would like to calculate it with a Fortran routine and the command user_getvar. With that I'm able to obtain the gradient: so just velocity u.gradient.gradient (and not velocity u.gradient x.gradient x!!)... as I cannot use the variable created in cfx-post: velocity u.gradient x. Do you have any suggestion to calculate d2u/dx2?? It doesn't matter how. Thanks
|
|
|
|
||
 |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| How to get a second derivative in udf? | demigod | Fluent UDF and Scheme Programming | 8 | September 28, 2015 04:38 |
| Derivative matrix | jollage | Main CFD Forum | 0 | September 21, 2011 19:16 |
| can i get pressure derivative in UDF? | ruirui389 | Fluent UDF and Scheme Programming | 4 | April 8, 2011 05:12 |
| scalar and its derivative | sucker | Main CFD Forum | 1 | April 15, 2008 14:28 |
| Second derivative with cfx 5.7.1 | Alessandro | CFX | 10 | April 21, 2006 11:31 |
Linear Mode
