Discussion Forum

Hello,

I am trying to solve a simple mass balance model based on the reaction kinetic expressions using the Synchronize feature as attached. I have the following questions.

1) Why do I get the “Failed to evaluate variable” message? C_H2 is a variable name used in mod1 and cH2 is one in mod2. Both are defined in the model.

2) Study 2 is automatically generated when I synchronize. Under the “physics selection” setting, do I need to select both of “re” and “chds” or do I need to just select “chds”? I looked at the deNOx model available in the model gallery, and they disconnected the “re” from the rest of the flow models. Why is that and what is the difference?

3) Also, Chemical Reaction Engineering manual says that we can return to and solve the equations defining the ideal reactor model (the ODE model) in the Reaction Engineering interface by clearing the Synchronization with COMSOL Multiphysics check box. But, I found that it does not work for “Study 1”.

Thanks.