RK
Ansys Employee

Hello, 


The Drag parameters tab can be found in the Injection properties window, under Physical models


The Brownian motion option is available only when the Energy equation is enabled and Stokes - Cunnigham drag law is selected. For more information, please refer to the following link. 


https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/flu_ug/flu_ug_Set_Injection_Properties.html


Regards, 


Rahul