Exact solution of Buckley_Leveret equation
 

Hi everybody,

How would be an anlytical solution of a Buckley_Leverett equation with initial condition :
u=1 when -1/2<=x <=0 and u=0 elsewhere, computed at t=0.4.

any help i really appreciate.

Thank you all.
Miguel.

P.S. I am so sorry because i sent again mistakenly an older message