CFD Online Discussion Forums

CFD Online Discussion Forums (
-   ANSYS (
-   -   problem with Transient Thermal Ansys (

simox 2 January 11, 2011 15:49

problem with Transient Thermal Ansys
Hello everyone,
I put my problem to the attention there.
Do I have a 2-D modeling of the freezing of the soil by liquid nitrogen with Ansys v12.
created the model with 2D AutoCAD and exported as a file. "sat" I've imported into Ansys DesignModeler as 2D drawing.
Then, open Mechanical, has verified that the connections were correct (delete some that the program had created automatically, but that did not exist) I went to set the parameters for analysis by setting the initial temperature of the soil and temperature, constant of -196 C of the cryogenic fluid.
carried out the analysis I find a "Maximum Temperature" which exceeds the initial temperature of the soil (12 C) with values that grow just over 12 C before returning to 12 C.
This is clearly insignificant!
Where is the error?
Thanks for the help.
P.S. I enclose also gives me errors:

*** WARNING *** CP = 5.117 TIME= 19:33:29
Element shape checking is currently inactive. Issue SHPP,ON or
SHPP,WARN to reactivate, if desired.

*** WARNING *** CP = 5.616 TIME= 19:33:30
Material number 123 (used by element 22298 ) should normally have at
least one MP or one TB type command associated with it. Output of
energy by material may not be available.

*** WARNING *** CP = 11.310 TIME= 19:33:35
The closed gap/penetration may be too large. Increase pinball if it is
a true closed gap/penetration. Decrease pinball if it is a false one.

*** WARNING *** CP = 11.310 TIME= 19:33:35
The initial penetration/gap is relatively large. Bonded/no separation
option may cause an accuracy issue. Switch to MPC algorithm or you
may use the CNCHECK,ADJUST command to move the contact nodes towards
the target surface.

All times are GMT -4. The time now is 03:34.