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ptc-51984841-Visitor
1-Visitor
July 31, 2013
Solved

Pdesolve help

  • July 31, 2013
  • 1 reply
  • 2468 views

Hello-

I am trying to use pdesolve to solve the unsteady heat conduction equation for a 1D plate that has heat generation and a convective boundary condition. I have the following sheet, but it keeps saying "variable is undefined". I have never used pdesolve before, but I think I am doing it right. Any suggestions would be appreciated.

Thanks

-Jon

Best answer by MihaiMoraru

Yes, you are doing right. One of the BCs creates the problem. I think you missed (probably a copy/paste error) to specify what is the difference in temperature at the end of the plate.

You used: Tair - T(z,t), but it should be Tair - T(zhalf,t). The solution obtained looks like in the picture. Please find the sheet attached.

Is this the solution you are looking for?

Transient+temperature+profile.PNG

1 reply

M
MihaiMoraru1-VisitorAnswer
1-Visitor
August 1, 2013

Yes, you are doing right. One of the BCs creates the problem. I think you missed (probably a copy/paste error) to specify what is the difference in temperature at the end of the plate.

You used: Tair - T(z,t), but it should be Tair - T(zhalf,t). The solution obtained looks like in the picture. Please find the sheet attached.

Is this the solution you are looking for?

Transient+temperature+profile.PNG

P
ptc-51984841-VisitorAuthor
1-Visitor
August 1, 2013

awesome! Thank you!

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