Realizable K epsilon

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi all

 

For using Realizable K epsilon Turbulence model .If i use  intensity and viscosity ratio

What will be the optimum value of  below said parameters for Internal flows

Turbulent velocity scale =

Turbulent viscosity ratio =

<?xml version="1.0" encoding="UTF-8"?>Viscosity ratio.JPG

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Dinesh,

     

    Turbulent velocity scale : is the average velocity at the inlet 

    Turbulence viscosity ratio: viscosity ratio, \frac{\mu_t}{\mu}, is the ratio between the turbulent viscosity, \mu_t, and the molecular dynamic viscosity, \mu.

    The turbulent viscosity ratio is directly proportional to the turbulent Reynolds number. Typically, the turbulence parameters are set between 1 to 10. here viscosity ratio 10 is good enough.

     

    Regards

    Ravi Harti

Categories