Question by Student 201327132 Dear professor. I have a question about assignment 6 #1. I found $Re_L=1.42×10^7$. But there is no information about $Re_L=1.42×10^7$ in Flow over Flat plate table. I confuse what I choose Nusselt num equation.
Yes, exactly. Indeed, recall the derivation of the Nusselt number: $$\frac{\delta_t}{\delta} \propto {\rm Pr}^{-1/3}$$ Thus, the larger the Prandtl number, the smaller $\delta_t$ is compared to $\delta$. 1 point bonus.
 Question by Student 201527110 Professor, I have a question related with “High speed” flow correction. I found that new film temperature T* and adiabatic wall temperature $T_{aw}$ can be derived from Isentropic relation $$\frac{T_0}{T_\infty}=1+\frac{\gamma-1}{2}M_\infty^2$$ and relation of stagnation enthalpy $$h_0=h_\infty+\frac{u_\infty^2}{2} with \Delta h=c_p \Delta T$$
 Question by Student 201527110 Sorry, I miss click the button. Using above equations and define new factor named as “Recovery factor” which can be defined as follow; $$r=\frac{T_{aw}-T_\infty}{T_0-T_\infty}$$ In here, I wonder the physical meaning of the recovery factor. Is that just a ratio between temperature differences?
I don't understand well your logic and how this recovery factor can be obtained from the stagnation temperature equation (you should have explained this fully). But anyway, you define $r$ as the ratio between temperature differences, so this is one physical meaning of it — I don't see any other possible physical interpretation..
 $\pi$