Cavitation with Thermodynamics table issue

Question

Greetings, 
 I have been attempting to use thermodynamic tables to simulate cavitation within a turbopump. Water was the working fluid. However, I have been getting a run time error right at the beginning of the simulation &ndash; this is seen in the attached log file I copied.

Fullscreen 
 3146.thermotable error.txt 
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 Try to spawn hexstreamdpx86_64.exe on MechStu OS: WIN32 with Login: 
Argument 1: none C:\Users\user\Desktop\December\EO_RC_0_12\EO_RC\EO_RC_cav_thermotables_0_05\EO_RC_cav_thermotables_0_05.run
Argument 2: -taskmanager none
Argument 3: -steering C:\Users\user\Desktop\December\EO_RC_0_12\EO_RC\EO_RC_cav_thermotables_0_05\EO_RC_cav_thermotables_0_05.steering
Argument 4: -niversion open111
Argument 5: -parendId 262166
start_status_ok
TRYRECONNECTED_TO_CHILDREN
SUBTASK_RECONNECTED_TO_CHILDREN
ASK FLOW SOLVER STEERING
FLOW SOLVER STARTED
PVM initialization done.
Block master processes write to std, all others write to log
version 11.1 double-precision.
Trying to read project C:\Users\user\Desktop\Vedanth\December\EO_RC_0_12\EO_RC\EO_RC_cav_thermotables_0_05\EO_RC_cav_thermotables_0_05
Restart and reset convergence history
FMG deactivated
Checking for coin license
Reading the database
WARNING - The option 'Allow Multiple Domains Per Process' is not compatible with PartitionerParallel_ = 0 
WARNING - Automatic swith to parallel partitioner, PartitionerParallel_ = 1
Restart and reset convergence history
Database opened and read successfully
RESET FLOW SOLVER STEERING
STEERING HAS BEEN RESET
Checking module licenses
All licenses checked out!
 in progress...
 in progress...
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cylindric coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cylindric coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cylindric coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cylindric coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
Checking for CAVITATION coin license in PARA
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cartesian coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cartesian coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cartesian coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
For incompressible fluids, the pressure switch is disconnected 
WARNING - For One Equation Turbulence Models tm_iResSmoo_ = 2 not allowed
 --> Setting tm_iResSmoo_ = 1
No transition point file
Initial solution in cartesian coordinates
 In Turbomachinery output mode, the expert parameter out_gaugeForceTorque_ is automatically reset to 0
Number of grid levels to generate = 4
Number of grid levels to generate = 4
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
correction for non-matching connections (if existing)
Saving C:\Users\user\Desktop\December\EO_RC_0_12\EO_RC\EO_RC_cav_thermotables_0_05\EO_RC_cav_thermotables_0_05_p0.dtw file
Saving C:\Users\user\Desktop\December\EO_RC_0_12\EO_RC\EO_RC_cav_thermotables_0_05\EO_RC_cav_thermotables_0_05_p0.dtw file
Solver has started
Start solving the testcase on current grid
Computing solution on fine grid
Output of solution to files for block 0 (fluid)
Finished output to files for block 0
Output of solution to files for block 1 (fluid)
Finished output to files for block 1
 iter adapt_id local var res-av res-max res-abs cellID 
 1 0 1 Mass 0.000000e+00 0.000000e+00 3.575875e+10 46511 
 iter adapt_id local var res-av res-max res-abs cellID 
 1 0 1 Mass 0.000000e+00 0.000000e+00 5.770544e+10 546440

I followed the parameter guidelines in the FINE Open user and theory guide when using the thermodynamic tables option (I first changed the iCavitation_ value to 2 then changed the rest of the parameters locally in the advanced Control variables tab). The initial solution was taken from a converged run without cavitation models. This initial solution worked with the Barotropic cavitation model but not with Thermodynamic tables. 
 I&rsquo;m still in the process of troubleshooting possible ways of where the error lies. Not certain if its relevant to the error, but I did not understand what the user manual meant by using thermodynamics tables in the Physical configuration > Fluid model page, seen in attached image. 
 
 I would appreciate any assistance on the error or to what the manual referred to for the former. 
 Kind regards, 
 Joseph

BIPal · Accepted Answer

Hi Joseph, 
 
 Here's a few options you could try: 
 
 Try imposing velocity at the inlet and static pressure at the outlet. This is a more robust b.c. combination. 
 Try progressively reducing the CFL number to values as low as 0.1 and see if it helps. 
 Ensure that the range of quantities in the thermodynamic table you are using covers all of the expected thermodynamic states in the final solution. If it's not the case, there should be a warning in the log file that values from the tables are being clipped. 
 
 Let me know if the above helps. 
 Best regards, 
 
 Botond

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Cavitation with Thermodynamics table issue

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