# Homework Help: Dimensional Analysis justifying assumptions and force dependent on angle

1. May 6, 2012

### Bi1a1

1. The problem statement, all variables and given/known data
i have attached a copy of the full question and my answer to part a (i'm stuck on part b which i have written below. The diagram is a bit too complicated to describe in words)

In an examination of this problem Edge (1968) assumed one-dimensional inviscid, incompressible flow, and also neglected gravity. Using the above given values and the dimensional analysis of (a), try and justify the assumptions made by Edge. Show that in this limit the dimensionless force coefficient CF depends only on the angle of attack. Take Fr = u20/(gh0) to be the dimensionless Froude number.

2. Relevant equations

i have attached my full working for this answer
final solution for part a
F/(ρv02LD2)=ff( α , gLD/VD2 , h0/LD , μ/ρV0LD)

3. The attempt at a solution
i have attached my solution to part a, my problem is just not understanding what to do for part b.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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