How to apply periodic border conditions in the Mesh interfaces in ANSYS fluent
 

hello
I try to apply periodic boundary conditions to a flow model in a heat exchanger, the model consists of part of a plate and a hot and cold fluid as shown in the attached image. In the Mish Interfaces section, the periodic boundary condition is set as shown in the attached picture. But the results were illogical. My question is whether the method you used is correct and whether the options you have chosen for the flow direction and type are related to this error. Please help me.
thank you