July 21, 2019 at 10:17 pmNikeshSubscriber
Dear all Friend
I have a problem with a subcooled boiling model. I'm looking for some help from people who are familiar with the RPI Wall boiling model in CFX
I am trying to model sub-cooled boiling in a straight heated tube to find DNB type CHF . The problem is set up by steady,constant property material, liquid as continuous while vapour as polydispersed fluid,buoyant,Homogenous turbulence, Homogenous MuSiG Model and RPI wall boiling model.
My problem is as following: Depending on the problem condition the calculation crashes after some number of iterations following a huge number repetitions of the following message:
" cal_TSUP1 WARNING: Changing upper bound for heat partition algorithm "
and at the end the error message is the following:
" ERROR #001100279 has occurred in subroutine ErrAction. Message: Heat partitioning algorithm failed to fix upper bound of bisection
Details of error:-
Error detected by routine FNDFIL CFNAME = * CRESLT = OLD
Can anybody help about this problem?
thanks to all
July 22, 2019 at 4:50 amDrAmineAnsys EmployeeBisection algorithm failed. Try using small time scales and ramp the heat flux.
July 23, 2019 at 3:10 pmNikeshSubscriber
I tried by doubling the heat flux and reducing the physical time step by the order of 2 but again the algorithm is failing.
July 24, 2019 at 5:12 amDrAmineAnsys EmployeeYou need to reduce heat flux or ramp it over iteration interval.
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