Hello

During the Modelling of Turbulent Multiphase Flows, Fluent Asks for Turbulent Parameters such as Turbulent Intensity and Length ?? Which Lenght is it talking about ? Suppose , if You model a flow in a duct and a large domain outside at the exit of the duct(pressure outlet ) to see the flow spreakd out ...wht would be the characterisitc length at the inlet and outlet?

Thanks

Bharath

Turbulence intensity at the inlet of the domain depend on degree on turbulence at that location suppose if u r inlet is atmospheric that around 10% of Turbulenc intensity is enough. About characteristic length its given in the mannual that it should be around 70% of inlet dimension.

For further details u can refer to Fluent mannual chapter 9. Hope its work for u Regards Sohail

hi sohail

Thanks for the reply.well..how about the Characteristic lengths for an outlet that is bigger than the inlet dimensions ? such as an expanded outlet ?

thanks

Bharath