Fluent 中流固耦合的实现问题!

Fluent 中流固耦合的实现问题!To couple the two sides of the wall,select the Coupled option under Thermal Conditions.(This option will appear in the Wall panel only when the wall is a two-sided wall.) No additional thermal boundary conditions are required,because the solver will calculate heat transfer directly from the solution in the adjacent cells.他说是“不需要给定额外的热边界条件,因为求解器会直接从临近的单元计算热传导”.可是,Fluent是怎么计算的呢?原理是什么,真心求指教啊!