Error message

oliveira1820 · May 30, 2018, 01:35

****** Notice ****** |
| The non-dimensional near wall temperature (T+) has been clipped |
| for calculation of vap.Wall Heat Transfer Coefficient. |
| |
| Boundary Condition : JANELA A Side 2 |
| T+ clip value = 1.0000E-10 |
| |
| If this situation persists and you are using the High Speed Model, |
| consider enabling Mach number based blending between low speed and |
| high speed wall functions. You can do so by specifying a Mach |
| number threshold as follows: |
| |
| EXPERT PARAMETERS: |
| highspeed wf mach threshold = 0.1 # default=0.0 (off) |
| END

I´m trying to simulate multiphase simulation with phase change between water and water vapour with Particle Model.

I have already updated the expert parameter but I still go this message, does anyone knows the source of the problem?

ghorrocks · May 30, 2018, 01:57

You should consider the information the message is saying. It is saying that the temperatures have been clipped. So did your temperature field start to diverge? Or a simulation setup error means the temperature is not controlled properly somewhere? Is it adequately converged? Have you modified the temperature clipping settings?

oliveira1820 · May 30, 2018, 02:36

When I remove turbulence and viscous work from my fluid pair the error message dissapears.

I´m using H20l and H20v as my simulation material, do you think it´s related to the table generation values (max and min temperature and pressure)?

Gert-Jan · May 30, 2018, 10:13

The conditions you are modelling are too complicated. Did you consider moderate conditions as a start and then speed things up? That would be a useful approach.

BTW, why on earth should you switch on viscous work? I think this is completely irrelvant.

TGS · June 5, 2024, 10:48

I got the same error message and I refined the mesh. It solved the problem.

May 30, 2018, 01:35	Error message	#1
oliveira1820 Senior Member Pedro Oliveira Join Date: Feb 2018 Location: Portugal Posts: 109 Rep Power: 8	**** Notice **** \| \| The non-dimensional near wall temperature (T+) has been clipped \| \| for calculation of vap.Wall Heat Transfer Coefficient. \| \| \| \| Boundary Condition : JANELA A Side 2 \| \| T+ clip value = 1.0000E-10 \| \| \| \| If this situation persists and you are using the High Speed Model, \| \| consider enabling Mach number based blending between low speed and \| \| high speed wall functions. You can do so by specifying a Mach \| \| number threshold as follows: \| \| \| \| EXPERT PARAMETERS: \| \| highspeed wf mach threshold = 0.1 # default=0.0 (off) \| \| END I´m trying to simulate multiphase simulation with phase change between water and water vapour with Particle Model. I have already updated the expert parameter but I still go this message, does anyone knows the source of the problem?

May 30, 2018, 01:57		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,830 Rep Power: 144	You should consider the information the message is saying. It is saying that the temperatures have been clipped. So did your temperature field start to diverge? Or a simulation setup error means the temperature is not controlled properly somewhere? Is it adequately converged? Have you modified the temperature clipping settings? __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

May 30, 2018, 02:36		#3
oliveira1820 Senior Member Pedro Oliveira Join Date: Feb 2018 Location: Portugal Posts: 109 Rep Power: 8	When I remove turbulence and viscous work from my fluid pair the error message dissapears. I´m using H20l and H20v as my simulation material, do you think it´s related to the table generation values (max and min temperature and pressure)?

May 30, 2018, 10:13		#4
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,901 Rep Power: 28	The conditions you are modelling are too complicated. Did you consider moderate conditions as a start and then speed things up? That would be a useful approach. BTW, why on earth should you switch on viscous work? I think this is completely irrelvant.

June 5, 2024, 10:48		#5
TGS New Member TGS Join Date: May 2023 Location: United Kingdom Posts: 29 Rep Power: 3	I got the same error message and I refined the mesh. It solved the problem.