How to define constant value at inlet boundaries?
 

Dear members
i have some problem with defining constant value at inlet boundaries for advection-diffusion equation.assigning the constant value of (c=c0) at each time step at inlet boundary leads to some oscillation near boundary.please
kindly help me to know what numerical treatment is needed to avoid such oscillations.
Regards.
M.Mojabi
Msc student,KNTU University

[IMG]file:///C:/DOCUME%7E1/1520/LOCALS%7E1/Temp/moz-screenshot.png[/IMG]