Solver Notice in Forced Convection Simulation
 

Hi all,

I am simulating internal forced convection inside a pipe. The fluid has very large viscosity and its temperature is lower than pipe walls temperature. I set normal velocity at inlet and mass flow rate at outlet, but in coeficient loop iteration = 21 this messenge is shown:

+--------------------------------------------------------------------+ | ****** Notice ****** | | While evaluating Temperature, | | Static Pressure on domain Dominio | | went outside of its lower limit. Its minimum value was | | -1.3035E+05. The bounds error was handled by clipping. | | If this situation persists, consider increasing the table range. | +--------------------------------------------------------------------+

where Dominio is the pipe. This messenge is shown in next iterations.

any suggestion?

Thanks a lot

Miguel

Re: Solver Notice in Forced Convection Simulation
 

Hi Miguel,

How does the temperature range of your boundary conditions compare to that of the table range you defined in your fluid properties? Also, did you specify a temperature at the wall, a heat flux or an external heat transfer coefficient?

Regards, Robin

Re: Solver Notice in Forced Convection Simulation
 

Hi Robin, thanks a lot for your reply.

Temperature of my boundary conditions (50 C at inlet)are between table range of my material properties [200 K, 3000 K]. I have defined a constant heat flux across pipe walls.

Regards