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January 11, 2011, 15:49 |
problem with Transient Thermal Ansys
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#1 |
New Member
simone
Join Date: Jan 2011
Posts: 5
Rep Power: 15 |
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. |
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