exporting 3D simulation's output data from model 1 and importing as input data for model 2

Hi,
I am trying to simulate on micro-mixer with 3D structure. I am having trouble with importing the model 1 output data to the model 2 input profile correctly. I tried using the interpolation function for model 1 concentration profile with 2 arguments. For model2's inflow definition, I am using int1(x,y). I was able to see the imported data correctly if I just plot the data. However, while running the simulation my concentration profile is not changing at all under laminar flow. Seems like I am missing any step .

Need urgent help ....

thanks
anil