Learning Forum

[n2390n]

The picture I found is in ANSYS Workbench help information.

I'm so lost regarding the settings for initial temperature and ambient temperature.

Let's say there's a preheated item at 673K(Continuously heated to maintain at 673K in buttom face.), and the ambient temperature is different at 298K. 

 

 

 

I would like to know if my settings are correct.   Greatly appreciate it if someone could provide an answer.

Thank alot.

 

 

[Sampat Kumar]

Hi 
Yes, Your setting for adding the initial temperature seems correct. Are you getting any discrepancies in the result using this method? 
For the Steady-State and Transient Thermal analyses, use the Details of the Initial Temperature object to scope the initial temperature value. For a Transient Thermal analysis that has a non-uniform temperature, you need to define an associated Initial Temperature Environment.  
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/mech_obj/ds_initial_temp_o_r.html?q=initial%20temperature
Best Regards,
Sampat

 

[n2390n]

firstly thx alot for ur help,

I want to explain my simulation, this is a transient laser heating process,

This is a workpiece that has been preheated and has three layers (673K) and is continuously heated at the bottom of the workpiece So I think that during the entire simulation process, the temperature should not fall below this temperature (673K by a large amount) But later in the simulation, it was found that during the cooling process after laser heating, abnormally low temperatures occasionally appear (-200K or even lower)

So I started to doubt whether there was a problem with my settings When setting the temperature of the workpiece, I chose 3 bodies instead of 1 face

But such a setting makes the laser heating unable to effectively raise the temperature

It may not be very well expressed, I hope you can understand

 

BYW

https://img.onl/ma45Vd

sorry post this link, I can't upload pic 

what's different in those 2 option

[n2390n]

firstly thx alot for ur help,

I want to explain my simulation, this is a transient laser heating process,

This is a workpiece that has been preheated and has three layers (673K) and is continuously heated at the bottom of the workpiece So I think that during the entire simulation process, the temperature should not fall below this temperature (673K by a large amount) But later in the simulation, it was found that during the cooling process after laser heating, abnormally low temperatures occasionally appear (-200K or even lower)

So I started to doubt whether there was a problem with my settings When setting the temperature of the workpiece, I chose 3 bodies instead of 1 face

But such a setting makes the laser heating unable to effectively raise the temperature

It may not be very well expressed, I hope you can understand

 

BYW

https://img.onl/ma45Vd

sorry post this link, I can't upload pic 

what's different in those 2 option

[Sampat Kumar]

Hi You Ruei Liang,
Sorry for the delayed response. 
I am not able to see any images. Please share the screenshot.  
this could be an undershoot problem with higher-order elements.
Mesh with linear elements 


Best Regards,
Sampat