# 9.5 Summary


The two dimensional analysis methods or approaches were presented in this chapter. Buckingham's $$\pi$$ technique is a quick "fix approach'' which allow rough estimates and relationship between model and prototype. Nusselt's approach provides an heavy duties approach to examine what dimensionless parameters effect the problem. It can be shown that these two techniques in some situations provide almost similar solution. In other cases, these technique proves different and even conflicting results. The dimensional analysis technique provides a way to simplify models (solving the governing equation by experimental means) and to predict effecting parameters.