Hi,

Under Solve-Limits... there are variable solution limits. Default value for absolute pressure is 1 pascal but when my case is solved I have absolute pressure values in my domain less much more then 1 pascal (e.g. -80000 pascals). What I have to done to stop decresing absolute pressure in my domain.

Regards, pp

Are you sure that you're displaying absolute pressure and not the gauge pressure? Fluent works in guage pressure to reduce rounding errors. What operating pressure have you set? Fluent defaults to 103125Pa.

Absoulte Pressure = Gauge Pressure + Operating Pressure

Absolute Pressures below the limit set will automatically be set to the limiting value and a warning message will be displayed.