Reynolds Number
 

Hello

I would like to knw whts the Reynolds Number limit for a free flow such as some distance from exit of an Nozzle ...to find if its a turbulent or Laminar Flow..??I have been modelling with Turbulent models for creating an uniformly distributed spray using VOF Model..but Im not sure ..abt whether I shud choose Laminar model or K-e turbulent Model !!

Your suggestions are greatly appreciated Thanks

Bharath

Re: Reynolds Number
 

what is the reynold no. at nozzle?

Re: Reynolds Number
 

Dear sir I have a problem with this title. If it's possible for you please send me your received responses. Very thanks for your attention to my request. With the best regards. Mahdi saniee nezhad

Re: Reynolds Number
 

Calculate the R no. for both nozzle and inlet. Based on the maximum R no. u should choose the model. If it is below 2000 u could choose Laminar other wise turbulent model. for low range 3000-10000 S-A model is the best as it takes less comuptation time, other wise k-e model.

Just have a look Fluent Manual Ch 10.

Alamgir