Laminar Flow +Chemical Reaction

Hi,

Can anyone please help me with my model and guide me as to where I am going wrong. I am trying to simulate a simple chemical reaction A+B-->C in a pipe filled with water flowing at laminar velocity. I create a laminar flow profile using Laminar physics which I used as my input velocity to the Transport of Diluted Species physics. I verified that the Laminar and Transport physics are coupled.

When I plot the concentration profile, there is no change in the reactant or products concentrations. They remain the same, meaning there is no reaction.

I have defined the reactions rates in the variables section of the model. I dont know if I am plotting it wrong or what is the issue.

Please Please help. I dont know where I am going wrong. I cleared all solutions and meshes as I was not able to upload the file with them due to size limit

Thanks,
Romani