# Similarity in fluid mechanics

1. May 28, 2016

### welovephysics

1. The problem statement, all variables and given/known data
i know that the ratio of length of prototype divided by the length of model would yield Lr

But , some book gave that length of model divided by length of prototype also= Lr ???

2. Relevant equations

3. The attempt at a solution
Which is correct ?

2. May 28, 2016

### welovephysics

IMO , both also correct ? am i correct ? can someone clarify?

3. May 29, 2016

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