warning message:turbulent viscosity limited to vis
 

when I use the KW model, after itera serveral times, FLUENT give the warning message:turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 421510 cells. But according to the formula in Fluent, the viscosity ratio of my model is far less than 1.000000e+005 , what can I do for this problem? when I use the ke model, this warning message of limit number could become vanished.