1. The problem statement, all variables and given/known data Hi there, I am having a theoretical dillema which does not involve a specific problem, rather I am thinking of this scenario in my head and I am not sure how to go about it. I am unsure whether to calculate P2 using the head loss or using the bernoulli equation. Because in text book examples they disregard the fact that a chamber may have a reduced diameter compared to the one before and so the pressure will be lower due to the higher velocity of the fluid as shown in the picture. Hence the only pressure drop is due to the orifice. image hosting website free free upload website hosting Is the text book example too simplified or am I missing a key concept? 2. Relevant equations 3. The attempt at a solution No specific problem so no solution. Thank you in advance!