Transient temperature flow through material
Altair EmployeeHello,
I am having difficultly to construct a model that shows temperature flow through a material. Attached is my model. I have one surface (bottom) at 100 degrees and initial condition of 25 degrees. It produces an output but it's not correct. Any ideas?
<?xml version="1.0" encoding="UTF-8"?>
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Altair EmployeeHello @Prakash Pagadala
I've looked at the tutorial for guidance and that's got me to where I am now. That example is a lot more complicated than mine which may be why I'm getting stuck.
Any other guidance?
Cheers,
Tom
Altair EmployeeAltair Employee
Attached is my latest attempted, following OS-T: 1090 example
I expect that at t=0 the temp of system will be 25°, as time increases the boundary where temperature is at 100° will slowly heat up transferring through the component, from x=0 to x=10.
Altair EmployeeAltair EmployeeHello @Prakash Pagadala
I'm getting this error importing the model. Is there a way to open this file?
<?xml version="1.0" encoding="UTF-8"?>
Altair EmployeeHello @Prakash Pagadala
I'm getting this error importing the model. Is there a way to open this file?
<?xml version="1.0" encoding="UTF-8"?>
And that is what I am after, lets hope I can open it!
Altair EmployeeAltair Employee
I can see what you have done and where I was going wrong thank you.
However, the model still won't run - see error message below.
There were 400 error messages during input processing.
The first message is repeated below:
*** See next message about line 484 from file:
W:/Stress Analysis/T Mansell/Practice 7.hm
'CQUAD4 1 0 126 131 122 123'
*** ERROR # 1000 *** in the input data:
Incorrect data in field # 3.
Altair EmployeeHi,
Looks like while exporting Property is missed out, sorry about that.
Can you check the component whether property is assigned or not,
If not, please assign the property and run again.
Altair Employee
Thank you for your help, I will try develop this model further.
However, the model initial start temperature is 0, although set to 25?
When you load the model up it is correct on frame one/t=0, but as soon as its cycled through time it adjusts to 0° at frame 2
Cheers,
Tom
Altair EmployeeAltair EmployeeThank you
Altair EmployeeAltair EmployeeAltair EmployeeI think this is related to timestep setting.I tried with N=39 and DT=5.
Altair Employee
Hello Rahul,
I have viewed the analysis you have completed however the same problem persists (Initial temperature of 0)
Cheers,
Tom
Altair EmployeeHi @Tom.Mansell
Sorry, I completely missed this.
I tried modifying the model but still, I have the same result. Let me check with experts on this.
Altair EmployeeHi @Tom.Mansell
Sorry, I completely missed this.
I tried modifying the model but still, I have the same result. Let me check with experts on this.
Any update on this?
We checked with experts and it seems the heat capacity on material is missing. We can add a warning in this case.
Also, pay attention to the following warning in the out file.
*** WARNING # 5062
Non-zero SPC will be considered as zero SPC for transient thermal
analysis, except when used to specify ambient point for convection.
Altair EmployeeHello @Rahul R
Same problem with the heat capacity of material defined.
Thanks for the help but I'm still stuck here.
Tom
Could share the value of heat capacity defined in your model.
Altair Employee
<?xml version="1.0" encoding="UTF-8"?>
Edit: Attached model
Please make sure that these units are consistent.BTW what unit system you are maintaining here.
Altair Employee
SI unit systems,
Distance: mm
Thermal Conductivity: W/m°C = tonne.mm/s3°C
Heat Capacity: Jkg/°C = kg2m2/s2°C = tonne2mm2/s2°C
Density: tonne/mm3
Temperature: °C
Thanks for sharing the details with us. I had escalated this to the development team. I guess this must be a model specific issue. I will update you once I get any response from the team.
Altair EmployeeThanks for sharing the details with us. I had escalated this to the development team. I guess this must be a model specific issue. I will update you once I get any response from the team.
Thank you @Rahul R.
Please let me know as soon as you have an update
Altair Employee
Hi @Tom.Mansell
Can you please follow the tutorial OS-T: 1090: Linear Transient Heat Transfer Analysis of an Extended Surface Heat Transfer Fin and check if this helps?