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Convergence problem according to the flow rate speed
Posted 5 giu 2014, 01:33 GMT-4 Fluid & Heat, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD) Version 4.4 0 Replies
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I try to simulate heat transfer from pipe to solid. Water flows inside the pipe with constant inlet temperature.
Pipe flow module (Non-Isothermal pipe flow) is used and flow rate is about 0.014m^3/min.
However there are error messeges that indicate "Not convergence"
If flow rate is decreased to 0.00014m^3/min, this model works well.
I coupled non-Isothermal pipe flow model and heat transfer in solid model.
What is the exact problem of my model and What is the solution?
The error messege is :
Nonlinear solver did not converge.
Maximum number of segregated iterations reached.
In segregated group 2 :
There was an error message from the linear solver.
The relative error (20) is greater than the relative to Time : 0
Last time step is not converged.
Hello Park Sangwoo
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