Fundamentals of Fluid Mechanics Assignment 5 — Stagnation Pressure  












Hint for Question #4. Several came to my office with a similar question. Check if your approach to find $u_2$ with the provided angles is valid by calculating $v_2$ and $w_2$ using similar arguments and checking if $u_2^2+v_2^2+w_2^2$ is equal to the expected $q_2^2$. If not, your logic definitely has a flaw that needs to be rectified..


In case the previous hint didn't help, here's another hint. Look at the reflected snow from above first. Then draw a triangle with sides $a$, $u_2$ and $w_2$ such that $a^2=u_2^2+w_2^2$ with $a$ being an unknown length. Then look at the reflected snow from the side. Then draw a triangle with sides $b$, $u_2$ and $v_2$ and such that $b^2=u^2_2+v_2^2$ with $b$ an unknown length. Now you have 5 unknowns: $u_2$, $v_2$, $w_2$, $a$, and $b$. Write down enough equations to solve for these 5 unknowns.



$\pi$ 