Transient temperature flow through material

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?

Hello @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 

@Tom.Mansell

OK, I will check the model you shared. 

Please share the expected results. 

Hi @Prakash Pagadala

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.

Unable to find an attachment - read this blog

Try this file

Unable to find an attachment - read this blog

Hello @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"?>

Hello @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!

Hi,

Please try this solver file. 

Unable to find an attachment - read this blog

@Prakash Pagadala

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.

Hi,

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. 

@Prakash Pagadala

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

@Tom.Mansell

You are right, let me investigate on that. 

@Tom.Mansell

 

You are right, let me investigate on that. 

Thank you

@Prakash Pagadala

Any update on this?

Cheers

@Tom.Mansell

I will check with experts on this. 

@Tom.Mansell

 

I will check with experts on this. 

@Prakash Pagadala

Have we got anything back?

I think this is related to timestep setting.I tried with N=39 and DT=5.

Unable to find an attachment - read this blog

@Rahul R

Hello Rahul,

I have viewed the analysis you have completed however the same problem persists (Initial temperature of 0)

Cheers,

Tom

Hi @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. 

Hi @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. 

@Prakash Pagadala

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.

Hello @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.

@Rahul R

<?xml version="1.0" encoding="UTF-8"?>

Edit: Attached model

Unable to find an attachment - read this blog

Please make sure that these units are consistent.BTW what unit system you are maintaining here.

@Rahul R

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.

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.

Thank you @Rahul R.

Please let me know as soon as you have an update

@Rahul R

Any feed back from the developers?