# Understanding the meaning of a certain boundary condition

Given, $$-k\frac{\partial T }{ \partial y}=h(T_f-T),$$ what does this term $$\left.{\partial T \over \partial y}\right|_{y =0}$$ physically describe in the convective boundary condition?

• – Farcher Mar 19 '18 at 8:57
• yes, related but simply this term tell us physically the rate of flux.but i am not sure about my answer that its tell the rate of flux are something else. – tehreem Mar 19 '18 at 9:27