But basically, whatever formulation you take there will be a formulation separate for laminar flow, and how do they match, how do they, how does the CF catch up with it? It should be a continuous curve; you can see this overlap region is a region where both laminar and turbulent flow stays that is, laminar flow changes to turbulent flow over a region of Reynolds number and this is normally called the transition flow, like this. Transition flow depends on local conditions take for example, a ship, we know that the model is much smaller in scale therefore, if I take the Reynolds number VL over mu for the model, then it will be much smaller than that of the ship. So, in the model, the model may be in totally laminar region and it will be more so if the model is smaller- can you understand that? This is our formulation for Reynolds number, model is being tested in