[crazzy.pirate43]

Hello,

I'm working in generating isotropic turbulence inlet boundary condition for a channel flow. Using LES with dynamicKEqn as a SGS, incompressible flow with pimpleFoam as a solver.

I'm using a version Von-Karman energy spectrum to generate the fluctuations. Till now the output for the Reynolds stresses are identical at different streamwise position in the channel which produce the homogeneity, but the problem is that when I tried to see the turbulence intensity decay through the channel I got this problem which is the behavior of the streamwise fluctuations as it increases through the channel instead of decreasing, as shown in the attached photo.

Could you please help me if any one know about that error of how to fix this problem????

Don't hesitate to ask for more information to clarify the problem

Thanks in advance

Mohamed