convection boundary condition (FEM thermal simulations)

[ppppraxxx]

Hello,

I am using T joint pipe for thermal simulations (using quarter model of Pipe with the branch ), and doing "transient thermal analysis" (3 load steps) to get the temperature profile during ramp up and ramp down of temperature in the pipes. I am applying convection boundary condition on the inside surface of the pipe and the branch (T joint). but when i solve in "ANSYS Workbench" i get an error saying 'unknown error occurred please check the solver output for more information.
Can anyone help me please.....

i don't know how to proceed now. please help.

 

[IRstuff]

Please refrain from multiple postings

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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[ppppraxxx]

Sorry about my multiple postings sir, I found out other ralevant group after my first posting, i will delete the rest!