# Formula of diameter

1. Sep 4, 2014

### emutudeng

1. The problem statement, all variables and given/known data

My vocabulary is pretty bad in specialized English, so I have to post a picture of problem

There are three pipes, the cross-section changes and all measures are illustrative, I need to find an easy formula to find the diameter of d3, so I can create formula in Excel and by changing numbers it calculates the answer.

2. Relevant equations

Formulas are from topic of momentum and forces,
Maybe this helps

3. The attempt at a solution

It should become something like ω/M max * some coefficients, but I havent found anything form books.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

File size:
10.2 KB
Views:
95
2. Sep 5, 2014

### Staff: Mentor

Perhaps if you were to explain in words what this formula is about, someone might recognize what you are trying to do.

3. Sep 5, 2014

### emutudeng

It means that the max refraction is 2%. The point is to find diameter of the upper pipe. It depends of the two others.